PDF CB Standard English Conventions Answers

Question ID de55ec71
Assessment Test Domain Skill Difficulty
SAT Reading and Writing Standard English Boundaries

Conventions
ID: de55ec71
Generations of mystery and horror have been influenced by the dark, gothic stories of celebrated American author Edgar Allan Poe (1
Which choice completes the text so that it conforms to the conventions of Standard English?
writers
writers,
writers—
writers;
ID: de55ec71 Answer
Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is punctuation between a subject and a verb. When, as in
this case, a subject (“Generations of mystery and horror writers”) is immediately followed by a verb (“have been
inuenced”), no punctuation is needed.
Choice B is incorrect because no punctuation is needed between the subject and the verb. Choice C is incorrect
because no punctuation is needed between the subject and the verb. Choice D is incorrect because no punctuation
is
needed between the subject and the

verb. Question Difficulty: Easy
Question ID
SAT Reading and Writing Standard English Form, Structure,

Conventions and Sense
ID: e38b3e4f
The radiation that during the decay of radioactive atomic nuclei is known as gamma radiation. Which choice completes the text so
occurs
have occurred
occur
are occurring
ID: e38b3e4f Answer
Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is subject-verb agreement. The singular verb "occurs"
agrees in number with the singular subject "radiation."
Choice B is incorrect because the plural verb "have occurred" doesn’t agree in number with the singular subject
"radiation." Choice C is incorrect because the plural verb "occur" doesn’t agree in number with the singular subject
"radiation." Choice D is incorrect because the plural verb "are occurring" doesn’t agree in number with the singular
subject "radiation."
Question Difficulty: Easy

Question ID

Conventions
ID: 89fbc3eb
The Mission 66 initiative, which was approved by Congress in 1956, represented a major investment in the infrastructure of overburd
facilities while also establishing educational programming for the public.
parks and
parks
parks;
parks,
ID: 89fbc3eb Answer
Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the coordination of main clauses within a
sentence. This choice uses a semicolon to correctly join the first main clause (“The Mission…parks”) and the
second main clause that begins with “it.”
Choice A is incorrect. When coordinating two longer main clauses such as these, it’s conventional to use a comma
before the coordinating

main clauses conjunction.
are fused without Choiceand/or
punctuation B is incorrect because
a conjunction. it results
Choice in a run-on
D is incorrect sentence.
because The two
it results in a
comma
splice. Without a conjunction following it, a comma can’t be used in this way to join two main clauses.
Question Difficulty: Medium

Question ID

Conventions
ID: 960dec02
A recent study tracked the number of bee species present in twenty-seven New York apple orchards over a ten-year period.
found that when wild growth near an orchard was cleared, the number of different bee species visiting the orchard
decreased.
Entomologist Heather Grab:
Entomologist, Heather Grab,
Entomologist Heather Grab
Entomologist Heather Grab,
ID: 960dec02 Answer
Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is punctuation use between a name and title and
between a subject and a verb. No punctuation is needed between the proper noun “Heather Grab” and
“entomologist,” the title that describes Grab. Additionally, no punctuation is needed between the sentence’s
subject (“Entomologist Heather Grab”) and the main verb (“found”) that indicates what Grab did.
Choice
becauseAnoispunctuation
incorrect because no punctuation
is needed. Setting the is needed between
entomologist’s theoff
name subject
with and the verb.
commas Choice
suggests thatBitiscould
incorrect
be
removed without affecting the coherence of the sentence, which isn’t the case. Choice D is incorrect because no
punctuation is needed between the subject and the verb.
Question Difficulty: Hard

Question ID

ID: 37e5c794
Despite being cheap, versatile, and easy to produce, they are made from nonrenewable petroleum, and most do not biodegrade in l
there are two problems associated with commercial plastics:
two problems are associated with commercial plastics:
commercial plastics’ two associated problems are that
commercial plastics have two associated problems:
ID: 37e5c794 Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is subject-modifier placement. This choice ensures that
the modifying phrase “despite being cheap, versatile, and easy to produce” appears immediately before the noun
it modifies, “commercial plastics,” clearly establishing that the commercial plastics—and not another noun in the
sentence—are being described as cheap, versatile, and easy to produce.
Choice A is incorrect because it results in a dangling modifier. The placement of the function word “there”
immediately afterChoice
easy to produce. the modifying phrasebecause
B is incorrect illogically and confusingly
it results suggests
in a dangling thatThe
modifier. “there” is cheap,
placement versatile,
of the and
noun “two
problems” immediately after the modifying phrase illogically suggests that the “problems” are cheap, versatile, and
easy to produce. Choice C is incorrect because it results in a dangling modifier. The placement of the noun phrase
“commercial plastics’ two associated problems” immediately after the modifying phrase illogically suggests that the
“problems” are cheap, versatile, and easy to produce.

Question ID

ID: 6f08641e
On April 5, 1977, Kitty Cone and 150 other disability rights activists entered a San Francisco federal building. After pleading for yea
Finally, on April 28, the legislation was signed.
pressure on lawmakers increased when the activists staged a sit-in protest
a sit-in protest staged by the activists increased pressure on lawmakers
lawmakers came under increased pressure when the activists staged a sit-in protest
the activists increased pressure on lawmakers by staging a sit-in protest
ID: 6f08641e Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is subject-modifier placement. This choice makes the
noun phrase “the activists” the subject of the sentence and places it immediately after the modifying phrase
“after...legislation.” In doing so, this choice clearly establishes that the activists—and not another noun in the
sentence—were pleading for the passage of antidiscrimination legislation.
Choice A is incorrect
lawmakers” because
immediately after itthe
results in a dangling
modifying modifier. The
phrase illogically placement
suggests of“pressure”
that the the noun phrase “pressure
was pleading foron
the
passage of antidiscrimination legislation. Choice B is incorrect because it results in a dangling modifier. The
placement of the noun phrase “a sit-in protest” immediately after the modifying phrase illogically suggests that
the “protest” was pleading for the passage of antidiscrimination legislation. Choice C is incorrect because it
results in a dangling modifier. The placement of the noun phrase “lawmakers” immediately after the modifying
phrase suggests that “lawmakers” were pleading for the passage of antidiscrimination legislation. While it’s
possible for lawmakers to plead for the passage of legislation, the context strongly suggests that it’s the activists
who pleaded for years for the passage of antidiscrimination legislation.

Question ID 3580533b

ID: 3580533b
In recent years, economists around the world have created new tools that quantify the overall well-being of a country’s citizens. Econ
citizens’ quality of life.
measures
had measured
would have measured
will have been measuring
ID: 3580533b Answer
Correct Answer: A
Rationale
Choice A is the best answer. The previous sentence tells us how economists in India "use" a certain tool, while
this sentence describes general facts about that tool. To express general facts (and also to match the simple
present tense of "use"), we should use the simple present tense form "measures."
Choice B is incorrect. This choice uses the past perfect tense, but the previous sentence tells us that the tool is
currently used
choice uses thetofuture
measure things,
perfect so the past
conditional tense
tense, butdoesn’t make sense
the previous for tells
sentence this verb. Choice
us that C is
the tool is incorrect. This to
currently used
measure things, so the future tense doesn’t make sense for this verb. Choice D is incorrect. This choice uses the
future perfect continuous tense, but the previous sentence tells us that the tool is currently used to measure
things, so the future tense doesn’t make sense for this verb.

Question ID

Conventions
ID: 74ce2f05
A study led by scientist Rebecca Kirby at the University of Wisconsin–Madison found that b1la3ck bears that eat human food
before hibernation have increased levels of a rare carbon isotope, due to the higherC levels in corn and cane sugar.
Bears with these elevated levels were also found to have much shorter hibernation periods on average.
13
A. carbon-13, (C)
13
B. carbon-13 (C)
13
C. carbon-13, (C),
13
D. carbon-13 (C),
ID: 74ce2f05 Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is the punctuation of a supplementary element within a
sentence. The comma after “(13C)” pairs with the comma after “isotope” to separate the supplementary element
“carbon-13 (13C)” from the rest of the sentence. This supplementary element defines the “rare carbon isotope,” and
the pair of commas indicates that this element could be removed without affecting the grammatical coherence of
the sentence.
Choice A is incorrect because it fails to use appropriate punctuation to separate the supplementary element
“carbon-13 (13C)” from the rest of the sentence. Choice B is incorrect because it fails to use appropriate punctuation
to separate the supplementary element “carbon-13 (13C)” from the rest of the sentence. Choice C is incorrect because
it fails to use appropriate punctuation to separate the supplementary element “carbon-13 (13C)” from the rest of the
sentence. The comma after “carbon-13” isn’t necessary because the parentheses around “13C” already separate this
element from the rest of the sentence.

Question ID

Conventions
ID: adf210e7
The haiku-like poems of Tomas Tranströmer, which present nature- and dream-influenced images in crisp, spare language, have earn
Cole, who has written that Tranströmer’s works “contain a luminous simplicity.”
writers. Among
writers among
writers; among
writers, among
ID: adf210e7 Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is punctuation use between a main clause and a
supplementary phrase. This choice correctly uses a comma to mark the boundary between the main clause (“The
haiku-like…writers”) and the supplementary phrase (“among…Cole”) that specifies a contemporary writer who has
praised Tomas Tranströmer’s haiku-like poems.
Choice A is incorrect because it results in a rhetorically unacceptable sentence fragment beginning with “among.”
Choice B is incorrect because it fails to mark the boundary between the main clause and the supplementary phrase
with appropriate punctuation. Choice C is incorrect because a semicolon can’t be used in this way to join the main
clause (“The haiku-like…writers”) and the supplementary phrase (“among…Cole”).

Question ID

ID: b7363ba2
Mathematician and meteorologist Edward Lorenz used the metaphor of the “butterfly effect” to explain how seemingly minor events
in Brazil might eventually grow into a storm elsewhere across the globe.
its wings
its wings’
it’s wing’s
it’s wings’
ID: b7363ba2 Answer
Correct Answer: A
Rationale
Choice A is the best answer. The conventions being tested are the use of possessive determiners and plural
nouns. The singular possessive determiner "its" and the plural noun "wings" correctly indicate that the buttery
has multiple wings.
Choice B is incorrect because the context requires the plural noun "wings," not the plural possessive noun "wings’."
Choice C is incorrect because the context requires the singular possessive determiner "its" and the plural noun
"wings," not the contraction "it’s" and the singular possessive noun "wing’s." Choice D is incorrect because the
context requires the singular possessive determiner "its" and the plural noun "wings," not the contraction "it’s"
and the plural possessive noun "wings’."

Question ID

ID: 1ee7b429
Bonnie Buratti of NASA’s Jet Propulsion Laboratory data about Saturn’s rings collected by the Cassini spacecraft when she made an in
of ring material on the moons’ surfaces.
studies
has been studying
will study
was studying
ID: 1ee7b429 Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is the use of verbs to express tense in a sentence. In this
choice, the past progressive tense verb “was studying” is consistent with the other past tense verbs (e.g., “made”
and “collected”) used to describe Buratti’s discovery. Further, the past progressive tense correctly indicates that
an ongoing action in the past was occurring (she was studying) at the same time that another event occurred in the
past (she made an interesting discovery).
Choice A is incorrect because the present tense verb “studies” isn’t consistent with the past tense verbs used to
describe Buratti’s discovery. Choice B is incorrect because the present perfect progressive tense verb “has been
studying” isn’t consistent with the past tense verbs used to describe Buratti’s discovery. Choice C is incorrect
because the future tense verb “will study” isn’t consistent with the past tense verbs used to describe Buratti’s
discovery.

Question ID

Conventions
ID: 333b2b65
While one requires oxygen and one does and anaerobic respiration are both forms of cellular respiration—that is, they are processe
not aerobic
not. Aerobic
not, aerobic
not; aerobic
ID: 333b2b65 Answer
Correct Answer: C
Rationale
Choice C is the best answer. A comma is the appropriate way to link the dependent clause “While...not” and the
independent clause that follows.
Choice A is incorrect. This choice creates a run-on sentence error. “While...not” is a dependent clause, which
must be separated from the independent clause that follows with some sort of punctuation. Choice B is incorrect.
This choice creates a sentence fragment. “While one requires oxygen and one does not” isn’t an independent
clause, so it
can’t stand alone as a complete sentence. Choice D is incorrect. This choice creates a punctuation error. “While one
requires oxygen and one does not” isn’t an independent clause, so it can’t be linked to the clause that follows with
a
semicolon.

Question ID

Conventions
ID: aaa1907f
To serve local families during the Great Depression, innovative New York City librarian Pura Belpré offered storytelling in both English
put on puppet shows dramatizing Puerto Rican folktales.
practice, at the time
practice at the time;
practice, at the time,
practice at the time,
ID: aaa1907f Answer
Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the punctuation of elements in a complex series. It’s
conventional to use a semicolon to separate items in a complex series with internal punctuation, and in this choice,
the semicolon after "time" is conventionally used to separate the first item ("offered…time") and the second
("celebrated…holiday") in the series of activities that librarian Pura Belpré offered. Moreover, the semicolon after
"time" matches the semicolon used later to separate the second item ("celebrated...holiday") and the third
("and...folktales") in the series.
Choice A is incorrect because it fails to use appropriate punctuation to separate the first item and the second item
in the complex series. Furthermore, a comma isn’t needed between the noun "practice" and the prepositional
phrase "at the time" because the prepositional phrase is essential to the full meaning of the phrase "an uncommon
practice at the time." Choice C is incorrect because a comma after "time" doesn’t match the semicolon used later
to separate the second ("celebrated...holiday") and third ("and...folktales") items in the series. Furthermore, a
comma isn’t needed between the noun "practice" and the prepositional phrase "at the time" because the
prepositional phrase is essential to the full meaning of the phrase "an uncommon practice at the time." Choice D
is incorrect because a comma after "time" doesn’t match the semicolon used later to separate the second
("celebrated...holiday") and third ("and...folktales") items in the series.

Question ID

Conventions
ID: 7f48b098
Photosynthesis, the mechanism by which plants use sunlight to turn carbon dioxide and water into is fueled in part by an enzyme ca
nutrients
nutrients and
nutrients,
nutrients—
ID: 7f48b098 Answer
Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the punctuation of a supplementary element within a
sentence. The comma after “nutrients” pairs with the comma after “photosynthesis” to separate the
supplementary element “the mechanism by which plants use sunlight to turn carbon dioxide and water into
nutrients” from the rest of the sentence. This supplementary element functions to define the term
“photosynthesis,” and the pair of commas indicates that this element could be removed without affecting the
grammatical coherence of the sentence.
Choice A is incorrect because it fails to use appropriate punctuation to separate the supplementary element from
the rest of the sentence. Choice B is incorrect because a conjunction can’t be paired with a comma in this way to
separate the supplementary element from the rest of the sentence. Choice D is incorrect because a dash can’t be
paired with a comma in this way to separate the supplementary element from the rest of the sentence.

Question ID

Conventions
ID: 148be4da
Human-made (synthetic) fibers used in clothes and many other consumer products are more durable than most natural plant
the manufacture of synthetic fibers requires toxic chemical solvents that can pollute air and water.
fibers,
fibers but
fibers
fibers, but
ID: 148be4da Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is the coordination of main clauses within a sentence.
This choice correctly uses a comma and the coordinating conjunction “but” to join the first main clause (“Human-
made...fibers”) and the second main clause (“the manufacture...water”).
Choice A is incorrect because it results in a comma splice. Without a conjunction following it, a comma can’t be
used in this way to join two main clauses. Choice B is incorrect because when coordinating two longer main
clauses
such as these, it’s conventional to use a comma before the coordinating conjunction. Choice C is incorrect because
it results in a run-on sentence. The two main clauses are fused without punctuation and/or a conjunction.

Question ID

Conventions
ID: 0f39b19c
After a spate of illnesses as a child, Wilma Rudolph was told she might never walk again. Defying all odds, Rudolph didn’t just walk
for her team in the 4x100-meter relay, becoming the first US woman to win three gold medals in a single Olympics.
ran—fast—during
ran—fast during
ran—fast, during
ran—fast. During
ID: 0f39b19c Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is punctuation use between sentences. In this choice, the
period is used correctly to mark the boundary between one sentence (“Defying…fast”) and another sentence that
begins with a supplementary phrase (“During…Olympics”).
Choice A is incorrect. When a dash is present in a sentence (“ran—fast”), it’s not conventional to use another dash
(“fast—during”) to mark the boundary between sentences because it creates a potentially confusing sentence. In
this context, a period, semicolon, or colon would be clear and more conventional. Choice B is incorrect because it
results
in a run-on sentence. The sentences (“Defying…fast”) and (“during…Olympics”) are fused without punctuation
and/or a conjunction. Choice C is incorrect because it results in a comma splice. A comma can’t be used in this
way to mark the boundary between sentences.

Question ID

ID: f0864217
Rabinal Achí is a precolonial Maya dance drama performed annually in Rabinal, a town in the Guatemalan highlands. Based on eve
captured while leading an invading force against him.
Rabinal Achí tells the story of K’iche’ Achí, a military leader who
K’iche’ Achí, the military leader in the story of Rabinal Achí,
the military leader whose story is told in Rabinal Achí, K’iche’ Achí,
there was a military leader, K’iche’ Achí, who in Rabinal Achí
ID: f0864217 Answer
Correct Answer: A
Rationale
Choice A is the best answer. The modifier “Based on events…by a king,” is describing the drama “Rabinal Achí.”
Modifiers need to be next to the subjects they describe, so “Rabinal Achí” needs to be the first word after the comma.
Choice B is incorrect. This doesn’t complete the text in a way that conforms to the conventions of Standard
English. The modifier “Based on events…by a king,” is describing the drama “Rabinal Achí.” Modifiers need to be
next to the
subjects they describe, so “Rabinal Achí” needs to be the first word after the comma. Choice C is incorrect. This
doesn’t complete the text in a way that conforms to the conventions of Standard English. The modifier “Based on
events…by a king,” is describing the drama “Rabinal Achí.” Modifiers need to be next to the subjects they describe, so
“Rabinal Achí” needs to be the first word after the comma. Choice D is incorrect. This doesn’t complete the text in
a way that conforms to the conventions of Standard English. The modifier “Based on events…by a king,” is
describing the drama “Rabinal Achí.” Modifiers need to be next to the subjects they describe, so “Rabinal Achí”
needs to be the first word after the comma.

Question ID

ID: c91ef0f0
During the American Civil War, Thomas Morris Chester braved the front lines as a war correspondent for the Philadelphia Press. A
activist and lawyer during the postwar Reconstruction period.
were
have been
are
was
ID: c91ef0f0 Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is subject-verb agreement. The singular verb "was"
agrees in number with the singular subject "amplifying." Gerunds such as "amplifying" are always singular.
Choice A is incorrect because the plural verb "were" doesn’t agree in number with the singular subject "amplifying."
Choice B is incorrect because the plural verb "have been" doesn’t agree in number with the singular subject
"amplifying." Choice C is incorrect because the plural verb "are" doesn’t agree in number with the singular subject
"amplifying."

Question ID

ID: 7b419faf
In 1903, environmentalist John Muir guided President Theodore Roosevelt on a scenic, sprawling trip through California’s Yosemite V
vow he upheld for his remaining six years in office.
is vowing
vowed
will vow
vows
ID: 7b419faf Answer
Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the use of verbs to express tense in a sentence. In this
choice, the past tense verb “vowed” is consistent with the other past tense verbs (“guided” and “upheld”) used to
narrate the events surrounding President Roosevelt’s decision to conserve the nation’s wilderness areas.
Choice A is incorrect because the present progressive tense verb “is vowing” isn’t consistent with the past tense
verbs used to narrate the events surrounding President Roosevelt’s decision to conserve the nation’s wilderness
areas. Choice C is incorrect because the future tense verb “will vow” isn’t consistent with the past tense verbs used
to narrate the events surrounding President Roosevelt’s decision to conserve the nation’s wilderness areas. Choice
D is incorrect because the simple present tense verb “vows” isn’t consistent with the past tense verbs used to
narrate the events surrounding President Roosevelt’s decision to conserve the nation’s wilderness areas.

Question ID

ID: 29c9be28
To survive when water is scarce, embryos inside African turquoise killifish eggs a dormant state known as diapause. In this state, em
enter
to enter
having entered
entering
ID: 29c9be28 Answer
Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is finite and nonfinite verb forms within a sentence. A
main clause requires a finite verb to perform the action of the subject (in this case, “embryos”), and this choice
supplies the clause with the finite present tense verb “enter” to indicate how the embryos achieve diapause.
Choice B is incorrect because the nonfinite to-infinitive “to enter” doesn’t supply the main clause with a finite
verb. Choice C is incorrect because the nonfinite participle “having entered” doesn’t supply the main clause
with a finite
verb. Choice D is incorrect because the nonfinite participle “entering” doesn’t supply the main clause with a finite
verb.

Question ID

ID: 983d33fa
In 1637, the price of tulips skyrocketed in Amsterdam, with single bulbs of rare varieties selling for up to the equivalent of
$200,000 in today’s US dollars. Some historians that this “tulip mania” was the first historical instance of an asset
bubble, which occurs when investors drive prices to highs not supported by actual demand.
claiming
claim
having claimed
to claim
ID: 983d33fa Answer
Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the use of finite and nonfinite verb forms within a
sentence. A main clause requires a finite verb to perform the action of the subject (in this case, “some historians”),
and this choice supplies the finite present tense verb “claim” to indicate what some historians do.
Choice A is incorrect because the nonfinite participle “claiming” doesn’t supply the main clause with a finite verb.
Choice C is incorrect because the nonfinite participle “having claimed” doesn’t supply the main clause with a finite
verb. Choice D is incorrect because the nonfinite to-infinitive “to claim” doesn’t supply the main clause with a finite
verb.

Question ID

ID: 6e193b19
Professional American football player Fred Cox invented one of the world’s most popular toys. In the 1970s, he came up with the i
were a smaller, foam version
are smaller, foam versions
were smaller, foam versions
is a smaller, foam version
ID: 6e193b19 Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is subject-verb agreement and agreement between nouns.
The singular verb “is” and the singular noun “version” both agree in number with the relative pronoun “which.” In
this context, “which” functions as a singular subject because it refers to the singular noun “the Nerf football.”
Choice A is incorrect because the plural verb “were” doesn’t agree in number with the singular noun phrase “the
Nerf football” that it’s modifying. Choice B is incorrect because the plural verb “are” and the plural noun “versions”
don’t agree in number with the singular noun phrase “the Nerf football” that they’re modifying. Choice C is incorrect
because the plural verb “were” and the plural noun “versions” don’t agree in number with the singular noun phrase
“the Nerf football” that they’re modifying.

Question ID 52b61716

ID: 52b61716
Formed in 1967 to foster political and economic stability within the Asia-Pacific region, the Association of Southeast Asian Nation
the 1990s, the organization its initial membership.
has doubled
had doubled
doubles
will double
ID: 52b61716 Answer
Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the use of verbs to express tense. In this choice, the past
perfect verb “had doubled” properly indicates that the doubling of the organization’s initial membership occurred
during a specific period before the present (between the organization’s founding in 1967 and the end of the 1990s).
Choice A is incorrect because the present perfect verb “has doubled” doesn’t indicate that the organization’s
doubling of its initial membership occurred during a specific period in the past. Choice C is incorrect because the
present tense verb “doubles” doesn’t indicate that the organization’s doubling of its initial membership occurred
during a specific period in the past. Choice D is incorrect because the future tense verb “will double” doesn’t indicate
that the organization’s doubling of its initial membership occurred during a specific period in the past.

Question ID

ID: 96c720af
Atoms in a synchrotron, a type of circular particle accelerator, travel faster and faster until they a desired energy level, at which poin
will reach
reach
had reached
are reaching
ID: 96c720af Answer
Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the use of verbs to express tense in a sentence. In this
choice, the present tense verb “reach” is consistent with the present tense verbs “travel” and “are diverted” used to
describe how atoms move through the synchrotron.
Choice A is incorrect because the future tense verb “will reach” is inconsistent with the present tense verbs used to
describe how atoms move through the synchrotron. Though the atoms’ movement is a recurring action and “will
reach” can also be used to indicate a habitual or recurring action, it creates a logical inconsistency in this sentence
when paired with the present tense verbs “travel” and “are diverted.” Choice C is incorrect because the past perfect
tense verb “had reached” is inconsistent with the present tense verbs used to describe how atoms move through the
synchrotron. Choice D is incorrect because the present progressive tense verb “are reaching” is inconsistent with
the present tense verbs used to describe how atoms move through the synchrotron. While both verbs occur in the
present, the present progressive tense suggests that the action is currently in progress. This creates a logical
inconsistency when paired with the present tense verbs “travel” and “are diverted,” which offer a general description
of the tendencies of the atoms’ movement, rather than a description of an action that is currently in progress.

Question ID

ID: dbd78791
Led by Syrian American astronomer Shadia Habbal, the Solar Wind Sherpas are an intrepid team of scientists who travel the globe to
during a total solar eclipse. When such an eclipse is imminent, the Sherpas pack up their telescopes and ready.
get
had gotten
got
were getting
ID: dbd78791 Answer
Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the use of verbs to express tense in a sentence. In
this choice, the present tense verb “get” is consistent with the other present tense verbs (“are,” “travel,” and “pack”)
used to describe the Sherpas and their activities.
Choice B is incorrect. The past perfect verb “had gotten” isn’t consistent with the other present tense verbs used to
describe the Sherpas and their activities. Choice C is incorrect. The past tense verb “got” isn’t consistent with the
other present tense verbs used to describe the Sherpas and their activities. Choice D is incorrect. The past
progressive verb “were getting” isn’t consistent with the other present tense verbs used to describe the Sherpas and
their activities.

Question ID 9091458d

Conventions
ID: 9091458d
Emperor penguins don’t waddle out of the ocean. They launch themselves at such a high speed that they travel up to two meters b
surface.
they are able to move so fast!
are they able to move so fast.
they are able to move so fast.
are they able to move so fast?
ID: 9091458d Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is end-of-sentence punctuation. This choice correctly uses
a question mark to punctuate the interrogative sentence “how are they able to move so fast?” The interrogative
sentence asks a direct question, and the next sentence answers it.
Choice A is incorrect because the context requires an interrogative sentence. The exclamative sentence “how they
are able to move so fast!” emphasizes the penguin’s high rate of speed, but it doesn’t set up the next sentence’s
explanation of how the penguins achieve such speeds. Choice B is incorrect because a period can’t be used in this
way to punctuate an interrogative sentence. Choice C is incorrect because the context requires an interrogative
sentence. The exclamative sentence “how they are able to move so fast” emphasizes the penguin’s high rate of
speed, but it doesn’t set up the next sentence’s explanation of how the penguins achieve such speeds.

Question ID

Conventions
ID: ac5536c1
Beatrix Potter is perhaps best known for writing and illustrating children’s books such as The Tale of Peter Rabbit (1902), but she also
nature and submitting her research on spore germination to the Linnean Society of London.
fungi; producing
fungi. Producing
fungi producing
fungi, producing
ID: ac5536c1 Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is punctuation use between two supplementary phrases
following the coordinate clause (“but she…mycology”). This choice correctly uses a comma to mark the boundary
between the supplementary noun phrase (“the study of fungi”) that defines the term “mycology” and the
supplementary participial phrase (“producing...London”) that provides additional information about the extent to
which Potter dedicated herself to mycology.
Choice A is incorrect because a semicolon can’t be used in this way to join two supplementary phrases following a
coordinate clause. Choice B is incorrect because it results in a rhetorically unacceptable sentence fragment
beginning with “producing.” Choice C is incorrect. The lack of punctuation results in a sentence that illogically
suggests that the study of fungi is producing more than 350 paintings.

Question ID

ID: 77bf77cd
Farouk El-Baz, a geologist and space scientist, part of the team that selected the lunar landing sites for the Apollo program during th
are
was
have been
were
ID: 77bf77cd Answer
Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is subject-verb agreement. The singular verb "was" agrees
in number with the singular subject "Farouk El-Baz."
Choice A is incorrect because the plural verb "are" doesn’t agree in number with the singular subject "Farouk El-
Baz." Choice C is incorrect because the plural verb "have been" doesn’t agree in number with the singular subject
"Farouk El-Baz." Choice D is incorrect because the plural verb "were" doesn’t agree in number with the singular
subject "Farouk El-Baz."

Question ID

ID: ea0aa676
In the 1970s, Janaki Ammal, a prominent botanist, emerged as a powerful voice in India’s environmental conservation movement. H
decision to preserve the forest.
are
were
have been
D. was
ID: ea0aa676 Answer
Correct Answer: D
Rationale
Choice D is the best answer. The subject "survey" is singular, and so is the verb "was."
Choice A is incorrect. The subject "survey" is singular, but the verb "are" is plural. Choice B is incorrect. The subject
"survey" is singular, but the verb "were" is plural. Choice C is incorrect. The subject "survey" is singular, but the verb
"have been" is plural.
Question ID 83898524

Conventions
ID: 83898524
In addition to advocating for South America’s independence in two political treatises, the Cartagena Manifesto and the Letter from Ja
Granada (present-day Colombia and Panama), Venezuela, and Quito (present-day from colonial rule.
Ecuador,)
Ecuador)
Ecuador),
Ecuador)—
ID: 83898524 Answer
Correct Answer: D
Rationale
sentence. The dash after “Ecuador” and the closing parenthesis pairs with the dash after “territories” to separate the
supplementary element (“New…Ecuador”) from the rest of the sentence. The supplementary element specifies the
three South American territories that Simó n Bolívar liberated, and the pair of dashes indicates that this element
could be removed without affecting the grammatical coherence of the sentence.
the rest of the sentence. Furthermore, punctuation isn’t needed between “Ecuador” and the closing
parenthesis. Choice B is incorrect because it fails to use appropriate punctuation to separate the supplementary
element from the rest of the sentence. Choice C is incorrect because a comma can’t be paired with a dash to
separate the supplementary element from the rest of the sentence.

Question ID

Conventions
ID: fba5d8d1
In a 2016 study, Eastern Washington University psychologist Amani El-Alayli found that, among the study participants who experie
one personality trait that they scored particularly openness to experience.
high. On
high on;
high on
high on:
ID: fba5d8d1 Answer
Correct Answer: D
Rationale
supplementary phrase. In this choice, a colon is correctly used to mark the boundary between the main clause
("there...on") and the supplementary phrase ("openness to experience") and to introduce the information that
identifies which personality trait participants scored especially high on.
Choice A is incorrect because it results in a rhetorically unacceptable sentence fragment beginning with "on" and
separates a necessary preposition from the clause beginning with "there." Choice B is incorrect because a semicolon
can’t be used in this way to join the main clause ("there...on") and the supplementary phrase ("openness to
experience"). A semicolon is conventionally used to join two main clauses, whereas a colon is conventionally used
to introduce an element that explains or amplifies the information in the preceding clause, making the colon the
better choice in this context. Choice C is incorrect because it fails to mark the boundary between the main clause
("there...on") and the supplementary phrase ("openness to experience").

Question ID

ID: 57998dd3
Obsidian is a kind of volcanic glass formed when lava cools so quickly that the atoms inside it cannot arrange themselves in a cry
had learned
had been learning
will learn
have learned
ID: 57998dd3 Answer
Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the use of verbs to express tense in a sentence. In this
choice, the future tense verb “will learn,” used in conjunction with the phrase “in a later chapter,” correctly indicates
that “you” (the reader) are going to learn about obsidian’s structure at some point in the future.
Choice A is incorrect because the past perfect verb “had learned” doesn’t indicate that the subject is going to learn
about obsidian’s structure in the future. Choice B is incorrect because the past perfect progressive verb “had been
learning” doesn’t indicate that the subject is going to learn about obsidian’s structure in the future. Choice D is
incorrect because the present perfect verb “have learned” doesn’t indicate that the subject is going to learn about
obsidian’s structure in the future.

Question ID

ID: dc645172
The artistic talents of Barbara Chase-Riboud, most known for her 1979 historical novel Sally Hemings and the conversation it inspired
described as “timeless” due to its use across eras and cultures—became part of her artistic identity.
hasn’t been
wasn’t
isn’t
aren’t
ID: dc645172 Answer
Correct Answer: D
Rationale
Choice D is the best answer. The subject "talents" is plural, and so is the verb "aren’t": "the artistic talents…aren’t
limited."
Choice A is incorrect. The subject "talents" is plural, but the verb "hasn’t been" is singular. Choice B is incorrect. The
subject "talents" is plural, but the verb "wasn’t" is singular. Choice C is incorrect. The subject "talents" is plural, but
the verb "isn’t" is singular.
Question ID

Conventions
ID: 6fece68e
Emperor Ashoka ruled the Maurya Empire in South Asia from roughly 270 to 232 BCE. He is known for enforcing a moral code calle
abolition of the slave trade.
life
life;
life:
life,
ID: 6fece68e Answer
Correct Answer: D
Rationale
Choice D is the best answer. Notice that "the sanctity of animal life" is the first item in a list of three things. We must
use a comma to separate the first two items in the list, just as a comma is used to separate "the just treatment of the
elderly" and "the abolition of the slave trade."
Choice A is incorrect. This choice creates a punctuation error. Notice that "the sanctity of animal life" is the first
item in a list of three things. To appropriately format the list, we need punctuation to separate each item. Choice B is
incorrect. This choice creates a punctuation error. Notice that "the sanctity of animal life" is the first item in a list of
three things. While semicolons are sometimes used to separate list items, this list uses commas to separate the
other list items, and lists must use the same punctuation throughout. Choice C is incorrect. This choice creates a
punctuation error. Notice that "the sanctity of animal life" is the first item in a list of three things. While colons can
be used to introduce lists, they can’t be used to separate items within a list.

Question ID

Conventions
ID: 886dc9f9
On July 23, 1854, a clipper ship called the Flying Cloud entered San Francisco left New York Harbor under the guidance of Captain Jos
ship set a record that would stand for 135 years.
Bay and having
Bay. Having
Bay, having
Bay having
ID: 886dc9f9 Answer
Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is punctuation use between sentences. In this choice, the
period after “Bay” is used correctly to mark the boundary between one sentence (“On…Bay”) and another sentence
that begins with a supplementary phrase (“Having…years”). Here, the supplementary phrase beginning with
“having” modifies the subject of the second sentence, “the celebrated ship.”
Choice A is incorrect. Without a comma preceding it, the conjunction “and” can’t be used in this way to join
sentences. Choice C is incorrect because it results in a comma splice. A comma can’t be used in this way to join
two
sentences. Choice D is incorrect because it results in a run-on sentence. The sentences (“On…Bay” and “having…
years”) are fused without punctuation and/or a conjunction.

Question ID

ID: 166efaa2
Public-awareness campaigns about the need to reduce single-use plastics can be successful, says researcher Kim Borg of Monash
reduction in plastic-bag use after cashiers were instructed to ask customers whether wanted a bag.
they
one
you
it
ID: 166efaa2 Answer
Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is pronoun–antecedent agreement. The plural pronoun
“they” agrees in number with the plural antecedent “customers.”
Choice B is incorrect because the singular pronoun “one” doesn’t agree in number with the plural antecedent
“customers.” Choice C is incorrect because the second person pronoun “you” isn’t conventional as a substitute for
“customers.” It suggests that the audience (“you”) is the customer. Choice D is incorrect because the singular
pronoun “it” doesn’t agree in number with the plural antecedent “customers.”

Question ID

Conventions
ID: 59a246dc
When external forces are applied to common glass made from silicates, energy builds up around minuscule defects in the materia
to make a glassy solid that can withstand higher strain than silicate glass can before fracturing.
compound, aluminum oxide
compound aluminum oxide,
compound, aluminum oxide,
compound aluminum oxide
ID: 59a246dc Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is the use of punctuation around noun phrases. No
punctuation is needed because the noun phrase “aluminum oxide” is a restrictive appositive, meaning that it
provides essential identifying information about the noun phrase before it, “the chemical compound,” and thus
doesn’t require punctuation around it.
Choice A is incorrect because no punctuation is needed. Choice B is incorrect because no punctuation is needed.
Choice C is incorrect because the noun phrase “aluminum oxide” is a restrictive appositive. Setting the phrase off
with punctuation suggests that it could be removed without affecting the coherence of the sentence, which isn’t the
case.

Question ID

ID: db4e3819
Midway through her 1968 jazz album A Monastic Trio, Alice Coltrane switches instruments, swapping the piano for the harp. With the
radiant sound.
sweep
are sweeping
were sweeping
sweeps
ID: db4e3819 Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is subject-verb agreement. The singular verb "sweeps"
agrees in number with the singular subject "she," which refers to Alice Coltrane.
Choice A is incorrect because the plural verb "sweep" doesn’t agree in number with the singular subject "she."
Choice B is incorrect because the plural verb "are sweeping" doesn’t agree in number with the singular subject "she."
Choice C is incorrect because the plural verb "were sweeping" doesn’t agree in number with the singular subject
"she."

Question ID

Conventions
ID: 6ea8c23f
In 2018, a team of researchers led by Dr. Caitlin Whalen compiled every available measurement of ocean mixing rates from the past
and what impact it has on the distribution of heat and nutrients in the ocean.
regions,
regions:
regions;
regions
ID: 6ea8c23f Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is punctuation between coordinates in a sentence. The two
elements "how…regions" and "what…ocean" work together as coordinates to complete the description of what the
team was able to determine. Because there are only two coordinates in this case (as opposed to a series of three or
more), no punctuation is needed between them.
Choice A is incorrect because no punctuation is needed between the coordinates "how…regions" and "what…ocean."
Choice B is incorrect because no punctuation is needed between the coordinates "how…regions" and "what…ocean."
Choice C is incorrect because no punctuation is needed between the coordinates "how…regions" and "what…ocean."

Question ID

Conventions
ID: aab74a3b
Researcher Lin Zhi developed a process for increasing the tensile strength—measured in gigapascals, or GPa—of silkworm
dissolving and reweaving the silk in a solution of iron metal ions, zinc, and sugar, Zhi increased the amount of force
required to stretch it from approximately 0.5 GPa to 2 GPa.
silk, by
silk by
silk and by
silk. By
ID: aab74a3b Answer
Correct Answer: D
Rationale
Choice D is the best answer. The independent clauses "researcher Lin Zhi…silk" and "by dissolving…2 GPa" can
be grammatically separated by a period. They can stand alone as sentences, and this is the only choice that lets
them do that.
Choice A is incorrect. This choice results in a grammar error called a comma splice. "Researcher Lin Zhi…silk" and
"by dissolving…2 GPa" are both independent clauses. They need to either be separated with punctuation like a period
or a semicolon, or they need to be connected by a comma and a coordinating conjunction like "and." A comma alone
isn’t enough. Choice B is incorrect. This choice results in a grammar error called a run-on sentence. "Researcher Lin
Zhi…silk" and "by dissolving…2 GPa" are both independent clauses. They need to either be separated with
punctuation like a period or a semicolon, or they need to be connected by a comma and a coordinating conjunction
like "and." Choice C is incorrect. This choice results in a grammar error called a run-on sentence. "Researcher Lin
Zhi…silk" and "by dissolving…2 GPa" are both independent clauses. The coordinating conjunction "and" isn’t enough
to link them by itself. We need a comma, too.

Question ID

Conventions
ID: 1724dac2
A subseasonal weather forecast attempts to predict weather conditions three to four weeks in its predictions are therefore more shor
advance.
advance,
advance
advance;
advance and
ID: 1724dac2 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The clause “A subseasonal…advance” and the clause “its predictions…forecast” are
both independent clauses, so using a semicolon to separate them is grammatically correct.
Choice A is incorrect. This choice creates a run-on sentence error. The clause “A subseasonal…advance” and the
clause “its predictions…forecast” are both independent clauses, so a comma is not enough to separate them. Choice
B is incorrect. This choice creates a run-on sentence error. The clause “A subseasonal…advance” and the clause
“its predictions…forecast” are both independent clauses, so they need to be separated with specific punctuation (a
period, a semi-colon, a colon, a dash, or a comma + a coordinating conjunction). Choice D is incorrect. This choice
creates a run-on sentence error. The clause “A subseasonal…advance” and the clause “its predictions…forecast” are
both independent clauses, so the word “and” by itself is not enough to separate them. There would need to be a
comma before “and” for this choice to work.

Question ID
ID: 512f0ac9
Working from an earlier discovery of Charpentier’s, chemists Emmanuelle Charpentier and Jennifer Doudna—winners of the 2020 No
cleaving bacteria a tool that is revolutionizing the field of gene technology.
to forge
forging
forged
and forging
ID: 512f0ac9 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the use of finite and nonfinite verb forms within a
sentence. The nonfinite to-infinitive “to forge” is correctly used to form a nonfinite (infinitive) clause that
explains why the chemists re-created and reprogrammed the DNA-cleaving bacteria.
Choice B is incorrect. Without a comma separating the main clause (“chemists...bacteria”) from the participle
“forging,” this choice illogically suggests that the bacteria are forging a tool, which doesn’t make sense. Choice C
is incorrect. Without a coordinating conjunction such as “and” placed before it, the finite past tense verb “forged”
can’t
be used in this way to describe the chemists’ actions. Choice D is incorrect. If read as a finite verb, the present
progressive verb “forging” isn’t consistent with the past tense verbs used in this sentence to describe the actions
of the chemists. If read as a nonfinite verb, the participle “forging” can’t be used in this way because there is no
following main clause for it to modify.

Question ID
Conventions
ID: a9e5b788
In discussing Mary Shelley’s 1818 epistolary novel Frankenstein, literary theorist Gayatri Spivak directs the reader’s attention to the c
novel
novel,
novel; rather,
novel, rather,
ID: a9e5b788 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the coordination of main clauses within a sentence.
This choice correctly uses a semicolon to join a main clause (“Saville...novel”) and a second main clause
(“she’s...it”) preceded by supplementary elements (“rather...narrative”).
Choice A is incorrect because it results in a run-on sentence. The two main clauses are fused without punctuation
and/or a conjunction. Choice B is incorrect because it results in a comma splice. Without a conjunction following
it, a comma can’t be used in this way to join two main clauses. Choice D is incorrect because it results in a
comma
splice. Without a conjunction following it, the comma after “novel” can’t be used in this way to join the two main
clauses.

Question ID

Conventions
ID: cdbbbf94
As British scientist Peter Whibberley has observed, “the Earth is not a very good timekeeper.” Earth’s slightly irregular rotation rate
added, whenever
added; whenever
added. Whenever
added whenever
ID: cdbbbf94 Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is punctuation between a verb and a preposition. When,
as in this case, a verb (“is added”) is immediately followed by a preposition (“whenever”), no punctuation is needed.
Choice A is incorrect because no punctuation is needed between the verb and the preposition. Choice B is incorrect
because no punctuation is needed between the verb and the preposition. Choice C is incorrect because no
punctuation is needed between the verb and the preposition.

Question ID

ID: d47bb0a4
Objects ranging from the Kikkoman soy sauce bottle to the Yamaha VMAX motorcycle to the Komachi bullet train
designed by twentieth-century industrial designer Kenji Ekuan.
was
is
has been
were
ID: d47bb0a4 Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is subject-verb agreement. The plural verb "were" agrees
in number with the plural subject "objects."
Choice A is incorrect because the singular verb "was" doesn’t agree in number with the plural subject "objects."
Choice B is incorrect because the singular verb "is" doesn’t agree in number with the plural subject "objects."
Choice C is incorrect because the singular verb "has been" doesn’t agree in number with the plural subject
"objects."

Question ID

ID: e3b72630
In the historical novel The Surrender Tree, Cuban American author Margarita Engle uses poetry rather than prose the true story of C
tells
told
is telling
to tell
ID: e3b72630 Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is the use of finite and nonfinite verb forms within a
sentence. The nonfinite to-infinitive “to tell” is correctly used to form a nonfinite (infinitive) clause that explains the
reason Engle uses poetry in her novel.
Choice A is incorrect because the finite present tense verb “tells” can’t be used in this way to explain the reason that
Engle uses poetry in her novel. Choice B is incorrect because the finite past tense verb “told” can’t be used in this
way to explain the reason that Engle uses poetry in her novel. Choice C is incorrect because the finite present
progressive tense verb “is telling” can’t be used in this way to explain the reason that Engle uses poetry in her
novel.

Question ID

ID: d2b81427
In assessing the films of Japanese director Akira Kurosawa, have missed his equally deep engagement with Japanese artistic tradition
many critics have focused on Kurosawa’s use of Western literary sources but
Kurosawa’s use of Western literary sources has been the focus of many critics, who
there are many critics who have focused on Kurosawa’s use of Western literary sources, but they
the focus of many critics has been on Kurosawa’s use of Western literary sources; they
ID: d2b81427 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is subject-modifier placement. This choice makes the
noun phrase “many critics” the subject of the sentence and places it immediately after the modifying phrase “in
assessing…Kurosawa.” In doing so, this choice clearly establishes that it is the critics—and not another noun in
the sentence—who assess Kurosawa’s films.
Choice B is incorrect because it results in a dangling modifier. The placement of the noun phrase “Kurosawa’s…
sources” immediately after the modifying phrase illogically suggests that his use of Western literary sources is what
assesses Kurosawa’s films. Choice C is incorrect because it results in a dangling modifier. The placement of the
function word “there” immediately after the modifying phrase illogically suggests that “there” is what assesses
Kurosawa’s films. Choice D is incorrect because it results in a dangling modifier. The placement of the noun
phrase “the focus…critics” immediately after the modifying phrase illogically suggests that the critics’ focus is
what assesses Kurosawa’s films.

Question ID

Conventions
ID: a1e0c981
In her book The Woman Warrior: Memoirs of a Girlhood Among Ghosts, author Maxine Hong Kingston examines themes
childhood, womanhood, and Chinese American identity by intertwining autobiography and mythology.
of:
of
of—
of,
ID: a1e0c981 Answer

Correct Answer: B
Rationale
Choice B is the best answer. “Themes of childhood” is one noun phrase, with “themes of” implicitly carrying over to
the other items on the list (“themes of childhood, [themes of] womanhood, and [themes of] Chinese American
identity”).
Choice A is incorrect. This choice inappropriately breaks up the introduction of a list. Also, “In her book…themes
of” is not an independent clause, thanks to the dangling “of” at the end, so it can’t precede a colon. Choice C is
incorrect.
This choice inappropriately breaks up the introduction of a list. Also, “In her book…themes of” is not an
independent clause, thanks to the dangling “of” at the end, so it can’t precede a single dash. Choice D is incorrect.
This choice
inappropriately breaks up the introduction of a list. “Themes of” implicitly carries over to each item on the list
(“themes of childhood, [themes of] womanhood, and [themes of] Chinese American identity”), so we don’t want to
use a comma to separate it.

Question ID
Conventions
ID: b35cefb7
The fine, powdery substance that covers the Moon’s surface is called regolith. Because regolith is both readily available and high in o
content and
content,
content
content, and
ID: b35cefb7 Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is punctuation between a subordinate clause and a main
clause. This choice correctly uses a comma to mark the boundary between the subordinate clause
(“Because...content”) and the main clause (“scientists...settlements”).
Choice A is incorrect. Joining the subordinate clause (“Because...content”) and the clause that follows
(“scientists...settlements”) with the conjunction “and” results in an ungrammatical sentence that lacks a main
clause. Choice C is incorrect because it fails to mark the boundary between the subordinate clause and the main
clause with appropriate punctuation. Choice D is incorrect. Joining the subordinate clause (“Because...content”)
and the clause that follows (“scientists...settlements”) with a comma and the conjunction “and” results in an
ungrammatical sentence that lacks a main clause.

Question ID
Conventions
ID: e76e74e8
Over twenty years ago, in a landmark experiment in the psychology of choice, professor Sheena Iyengar set up a jam-tasting booth
varied:
varied,
varied, while
varied while
ID: e76e74e8 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the use of a colon within a sentence. In this choice, the
colon is used in a conventional way to introduce the following description of how the number of jams available
varied.
Choice B is incorrect because it creates a comma splice. A comma can’t be used in this way to join two main
clauses
(“the number…varied” and “some…six”). Choice C is incorrect because it results in an illogical and confusing
sentence. Using the conjunction “while” to join the main clause (“the number…varied”) with the following clause’s
description of the number of jams available suggests that the variation in the number of jams is in contrast to some
shoppers having twenty-four options. Choice D is incorrect because it results in an illogical and confusing
sentence. Using “while” in this way suggests that the number of jams available varied during the time in which
some shoppers had twenty-four options and others had six. The sentence makes clear, however, that what follows
“varied” is a description of the variation, not a separate, simultaneous occurrence.

Question ID
ID: b74f676f
Classical composer Florence Price’s 1927 move to Chicago marked a turning point in her career. It was there that Price premiered he
developing
developed
to develop
having developed
ID: b74f676f Answer

Correct Answer: B
Rationale
Choice B is the best answer. The missing verb is part of the same clause as the verb "premiered," and "Price" is the
subject of both. So we need the past-tense form "developed" in order to match "premiered."
Choice A is incorrect. This choice creates a verb form error. The missing verb is part of the same clause as the verb
"premiered," and "Price" is the subject of both. So we need the past-tense form "developed" in order to match
"premiered." Choice C is incorrect. This choice creates a verb form error. The missing verb is part of the same
clause as the verb "premiered," and "Price" is the subject of both. So we need the past-tense form "developed" in
order to
match "premiered." Choice D is incorrect. This choice creates a verb form error. The missing verb is part of the
same clause as the verb "premiered," and "Price" is the subject of both. So we need the past-tense form
"developed" in order to match "premiered."

Question ID
ID: 3a35ddd1
Like other amphibians, the wood frog (Rana sylvatica) is unable to generate its own heat, so during periods of subfreezing temperat
had survived
survived
would survive
survives
ID: 3a35ddd1 Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is the use of verbs to express tense. In this choice, the
present tense verb “survives” correctly indicates that the wood frog regularly survives subfreezing temperatures by
producing large amounts of glucose.
Choice A is incorrect because the past perfect verb “had survived” doesn’t indicate that the wood frog regularly
survives subfreezing temperatures by producing large amounts of glucose. Choice B is incorrect because the past
tense verb “survived” doesn’t indicate that the wood frog regularly survives subfreezing temperatures by
producing
large amounts of glucose. Choice C is incorrect because the conditional verb “would survive” doesn’t indicate
that the wood frog regularly survives subfreezing temperatures by producing large amounts of glucose.

Question ID

ID: 69f031ab
While exploring Nevada’s Gypsum Cave in 1930, Seneca and Abenaki archaeologist Bertha Parker made her most famous discovery:
places
placed
place
to place
ID: 69f031ab Answer

Correct Answer: D
Rationale
Choice D is the best answer. The object for the verb "was" is "first," and "to place" is acting as a modifier for "first."
What was the finding? It was "the first." The first to do what? The first "to place humans in North America" 10,000
years ago. When a verb serves as a modifier within a noun phrase, it must be nonfinite (i.e., not conjugated to a
specific subject). The infinitive form "to place" is the only nonfinite option among the choices that makes sense in
context.
Choice A is incorrect. The object for the verb "was" is "first," and "places" is acting as a modifier for "first." What was
the thing that Parker’s finding did? What was it the first to do? Place humans in North America 10,000 years ago.
When a verb acts as a modifier, it must be nonfinite (i.e., not conjugated to a specific subject), but "places" is a
finite form of the verb. Choice B is incorrect. The object for the verb "was" is "first," and "placed" is acting to
modify "first." What was it that Parker’s finding was the first to do? Place humans in North America 10,000 years
ago. When a verb acts as a modifier, it must be nonfinite (i.e., not conjugated to a specific subject), but "placed" is
a finite form. "Placed" can also be a past participle, but that wouldn’t make sense here because the meaning of
"the first placed humans" would be unclear. Choice C is incorrect. The object for the verb "was" is "first," and
"place" is modifying "first." What was the thing that Parker’s finding did? What was it the first to do? Place
humans in North America. When a verb acts as a modifier, it must be nonfinite (i.e., not conjugated to a specific
subject), but "place" is a finite form of the
verb. Additionally, "place" can’t serve as a noun here, because it results in an illogical sentence (the "finding"
wasn’t "the first place").

Question ID
Conventions
ID: 083a35dc
Po’Pay was a Tewa leader from Ohkay Owingeh, a pueblo located about twenty-five miles north of present-day Santa Fe, New Mexic
A. 1680
B. 1680 and
C. 1680,
D. 1680, and
ID: 083a35dc Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is the coordination of main clauses within a sentence.
This choice correctly uses a comma and the coordinating conjunction “and” to join the first main clause (“He…
1680”) and the second main clause (“as…time”).
and/or a conjunction. Choice B is incorrect because when coordinating two longer main clauses such as these, it’s
conventional to use a comma before the coordinating conjunction. Choice C is incorrect because it results in a
comma splice. Without a conjunction following it, a comma can’t be used in this way to join two main clauses.

Question ID
Conventions
ID: aab78b25
Psychophysicist Howard Moskowitz was hired by a soda company to determine how much artificial sweetener After conducting consu
do most people prefer in a diet drink?
do most people prefer in a diet drink.
most people prefer in a diet drink?
most people prefer in a diet drink.
ID: aab78b25 Answer

Correct Answer: D
Rationale
Choice D is the best answer. This sentence is a statement: “Moskowitz was hired by a soda company to
determine how much artificial sweetener most people prefer in a diet drink.” So a period is the most
appropriate punctuation mark.
Choice A is incorrect. This doesn’t complete the text in a way that conforms to the conventions of Standard
English.
This sentence is not a question—it’s a statement. So a question mark is not the appropriate punctuation. Choice B
is incorrect. This doesn’t complete the text in a way that conforms to the conventions of Standard English. We
already have the verbs “was hired…to determine” in this sentence. The verb “do” is not needed and results in a
confusing,
ungrammatical sentence. Choice C is incorrect. This doesn’t complete the text in a way that conforms to the
conventions of Standard English. This sentence is not a question—it’s a statement. So a question mark is not the
appropriate punctuation.

Question ID

Conventions
ID: 145d5ca7
Gathering accurate data on water flow in the United States is challenging because of the country’s millions of miles of
the volume and speed of water at any given location can vary drastically over time.
waterways and the fact that,
waterways, and the fact that,
waterways, and, the fact that
waterways and the fact that
ID: 145d5ca7 Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is punctuation within two coordinated noun phrases.
When, as in this case, a noun phrase (“the country’s millions of miles of waterways”) is coordinated with
another noun phrase (“the fact”) followed by an integrated relative clause (“that the volume...time”), no
punctuation is needed.
Choice C is incorrect because no punctuation is needed.

Question ID

ID: 843f92af
The sun never sets during the Arctic summer in the Far North. In response, reindeer in this region must change their sleep habits. In
digest
will digest
to digest
digesting
ID: 843f92af Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the use of nonfinite verb forms within a sentence.
Working together with the finite verb "need," the nonfinite to-infinitive verb "to digest" is correctly used to form a
subordinate clause that describes what the reindeer need.
Choice A is incorrect because the verb "digest" (in either its finite or nonfinite form) can’t be used in this way
with the finite verb "need." Choice B is incorrect because the finite verb "will digest" can’t be used in this way
with the
finite verb "need." Choice D is incorrect because the nonfinite participle "digesting" can’t be used in this way
with the finite verb "need."

Question ID

ID: 430d929a
British scientists James Watson and Francis Crick won the Nobel Prize in part for their 1953 paper announcing the double helix struc
They’re
It’s
Their
Its
ID: 430d929a Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the use of possessive determiners. The plural possessive
determiner “their” agrees in number with the plural conjoined noun phrase “Watson and Crick” and thus indicates
that the findings were those of Watson and Crick.
Choice A is incorrect because “they’re” is the contraction for “they are,” not a possessive determiner. Choice B is
incorrect because “it’s” is the contraction for “it is” or “it has,” not a possessive determiner. Choice D is incorrect
because the singular possessive determiner “its” doesn’t agree in number with the plural conjoined noun phrase
“Watson and Crick.”

Question ID
Conventions
ID: be34a3df
In 2008, two years after the death of science fiction writer Octavia Butler, the Huntington Library in received a collection of more than
California,
California:
California—
California
ID: be34a3df Answer

Correct Answer: D
Rationale
Choice D is the best answer. No punctuation should separate the subject of the sentence (“the Huntington Library in
California”) from its verb (“received”).
Choice A is incorrect. No punctuation should separate the subject of the sentence (“the Huntington Library in
California”) from its verb (“received”). Choice B is incorrect. No punctuation should separate the subject of the
sentence (“the Huntington Library in California”) from its verb (“received”). Choice C is incorrect. No punctuation
should separate the subject of the sentence (“the Huntington Library in California”) from its verb (“received”).

Question ID
ID: 1f8cd95f
In the 1950s, a man named Joseph McVicker was struggling to keep his business afloat when his sister-in-law Kay Zufall advised him to
suggested
suggests
had suggested
was suggesting
ID: 1f8cd95f Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the use of verbs to express tense. In this choice, the
simple past tense verb “suggested” properly indicates that Zufall offered her suggestion for the product’s name in
the past. This verb tense is consistent with the previous sentence’s use of a simple past tense verb (“advised”) to
describe Zufall’s advice to McVicker in the 1950s.
Choice B is incorrect because the present tense verb “suggests” doesn’t indicate that Zufall offered her suggestion
in the past. Choice C is incorrect because the past perfect verb “had suggested” isn’t consistent with the previous
sentence’s use of the simple past tense verb “advised” to describe Zufall’s advice to McVicker. Choice D is
incorrect because the past progressive verb “was suggesting” isn’t consistent with the previous sentence’s use of
the simple past tense verb “advised” to describe Zufall’s advice to McVicker.

Question ID
Conventions
ID: 73a6603c
On sunny days, dark rooftops absorb solar energy and convert it to unwanted heat, raising the surrounding air a light- colored coverin
temperature; by adding
temperature, adding
temperature. Adding
temperature by adding
ID: 73a6603c Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is punctuation use between sentences. In this choice, the
period is used correctly to mark the boundary between the first sentence (“On…temperature”) and the second
sentence (“Adding…effect”). The gerund phrase beginning with “adding” is the subject of the second sentence, and
the verb phrase “helps combat this effect” describes what adding a light-colored covering can do.
Choice A is incorrect because a semicolon can’t be used in this way to join the sentence “On...temperature” and
the supplementary phrases that follow. Doing so leaves the verb phrase “helps combat” without a subject and thus
results in a grammatically unconventional sentence. Choice B is incorrect because it results in a comma splice. A
comma can’t be used in this way to mark the boundary between sentences. Choice D is incorrect. This choice
results in a confusing and illogical sentence that suggests that adding a light-colored covering to an existing dark
roof raises the temperature of the surrounding air. Furthermore, it creates ambiguity by leaving the verb phrase
“helps
combat” without a subject (so it isn’t clear what helps combat the effect).

Question ID

Conventions
ID: 70ced8dc
Typically, underlines, scribbles, and notes left in the margins by a former owner lower a book’s when the former owner is a famous
value, but
value
value,
value but
ID: 70ced8dc Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the coordination of independent clauses within a
sentence. An independent clause is a phrase containing a subject and a verb that can stand on its own as a
sentence. This choice uses a comma and the coordinating conjunction “but” to join the first independent clause
(“underlines…lower a book’s value”) and the second independent clause (“such markings…can be a gold mine to
scholars”) to create a compound sentence.
Choice B is incorrect because it results in a run-on sentence. The two independent clauses are fused without
punctuation and/or a conjunction. Choice C is incorrect because it results in a comma splice. A comma can’t be
used in this way to mark the boundary between two independent clauses. Choice D is incorrect because a comma
is needed to mark the boundary between two coordinated independent clauses.

Question ID
ID: 3bceeb93
When they were first discovered in Australia in 1798, duck-billed, beaver-tailed platypuses so defied categorization that one scientist a
they’re
their
its
it’s
ID: 3bceeb93 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The singular possessive pronoun "its" agrees with the singular antecedent "the animal"
and indicates that the "young" belong to it.
Choice A is incorrect. This choice creates a pronoun-antecedent agreement error. "They’re" is a contraction of
"they are," a plural pronoun and verb, but the antecedent "the animal" is singular. Also, we don’t need the extra verb
"are" —
we already have a main verb in this clause, so adding "are" would be confusing and ungrammatical. Choice B is
incorrect. This choice creates a pronoun-antecedent agreement error. "Their" is a plural pronoun, but the subject
of the sentence is "the animal," a singular noun. Choice D is incorrect. This choice creates a confusing and
ungrammatical sentence. "It’s" is a contraction for "it is." We already have the verb "nurses" in this clause, so we
shouldn’t add the verb "is."

Question ID
Conventions
ID: 8a3998f1
After the United Kingdom began rolling out taxes equivalent to a few cents on single-use plastic grocery bags in 2011, plastic-bag cons
percent, such
percent and such
percent. Such
percent such
ID: 8a3998f1 Answer

Correct Answer: C
Rationale
period after “percent” is used correctly to mark the boundary between one sentence (“After…percent”) and another
(“Such…up”).
Choice A is incorrect because it results in a comma splice. A comma can’t be used in this way to mark the
boundary
between sentences. Choice B is incorrect. Without a comma preceding it, the conjunction “and” can’t be used in this
way to join sentences. Choice D is incorrect because it results in a run-on sentence. The sentences (“After…percent”
and “Such…up”) are fused without punctuation and/or a conjunction.

Question ID
Assessment
Test Domain Skill Difficulty
SAT
Reading and Standard English Form, Structure,
Writing Conventions and Sense
ID: dab8b8ee
Known as Earth’s “living skin,” biocrusts are thin layers of soil held together by surface-dwelling microorganisms such as
fungi, lichens, and cyanobacteria. Fortifying soil in arid ecosystems against erosion,
A. a recent study’s estimate is that these crusts reduce global dust emissions by 60 percent each year.
B. an estimated 60 percent reduction in global dust emissions each year is due to these crusts, according to a recent study.
C. these crusts reduce global dust emissions by an estimated 60 percent each year, according to a recent study.
D. a recent study has estimated that these crusts reduce global dust emissions by 60 percent each year.
ID: dab8b8ee Answer
Correct Answer:
C Rationale
Choice C is the best answer. The subject of the modifier "fortifying soil in arid ecosystems against erosion" is
"biocrusts." Subject-modifier placement requires a modifier and its subject to be next to each other, so "biocrusts" or
some variant meaning "biocrusts" (in this case, "these crusts") must begin the missing clause.
Choice A is incorrect. Modifiers and their subjects must go next to each other. The subject of the modifier
"fortifying soil in arid ecosystems against erosion" is "biocrusts," not "a recent study’s estimate." Choice B is
incorrect.
Modifiers and their subjects must go next to each other. The subject of the modifier "fortifying soil in arid
ecosystems against erosion" is "biocrusts," not "an estimated 60 percent reduction." Choice D is incorrect.
Modifiers and their subjects must go next to each other. The subject of the modifier "fortifying soil in arid
ecosystems against erosion" is "biocrusts," not "a recent study."

Question ID
ID: 4bed4658
In order to prevent nonnative fish species from moving freely between the Mediterranean and Red Seas, marine biologist Bella Ga
creates
create
creating
created
ID: 4bed4658 Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the use of non-finite (untensed) verb forms in a
sentence. The modal “would,” which indicates the future from a perspective in the past, should be accompanied by a
non-finite plain form verb. In this choice, the non-finite plain form verb “create” is used correctly in conjunction
with the non-finite plain form verb “increase” to describe what the lock would do.
Choice A is incorrect because the finite present tense verb “creates” can’t be used in this way with the modal
“would” to describe what the lock would do. Choice C is incorrect because the present participle “creating” can’t be
used in this way with the modal “would” to describe what the lock would do. Choice D is incorrect because the finite
past tense verb “created” can’t be used in this way with the modal “would” to describe what the lock would do.

Conventions
ID: 96953201
In her two major series “Memory Test” and “Autobiography,” painter Howardena Pindell explored themes healing, self- discovery, an
of
of,
of—
of:
ID: 96953201 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is punctuation between a preposition and its complement.
No punctuation is needed between the preposition “of” and its complement, the noun phrase “healing, self-
discovery, and memory.”
Choice B is incorrect because no punctuation is needed between a preposition and its complement. Choice C is
incorrect because no punctuation is needed between a preposition and its complement. Choice D is incorrect
because no punctuation is needed between a preposition and its complement.

Question ID
Conventions
ID: 8f6d6ae6
Archaeologists have estimated that the pre-Columbian Native American city of Cahokia, located across the Mississippi River from mod
CE making
CE. Making
CE, making
CE; making
ID: 8f6d6ae6 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The phrase “making…at the time” provides additional information about Cahokia
that’s not required for the sentence to make sense or function grammatically. As a nonessential supplement, this
phrase should be separated from the rest of the sentence with a comma.
Choice A is incorrect. This choice results in a run-on sentence. The nonessential descriptive aside “making…at the
time” needs to be separated from the rest of the sentence with a comma. Choice B is incorrect. This choice results
in a sentence fragment. “Making…at the time” doesn’t have a subject and can’t stand on its own as a sentence.
Thus, it can’t be separated from the rest of the sentence with a period. Choice D is incorrect. This choice results in
a punctuation error. “Making…at the time” doesn’t have a subject and can’t stand on its own as an independent
clause. Since a semicolon can only link two independent clauses, using one here creates an error.

Question ID

Conventions
ID: 26c8c88c
About 70,000 meteorites have been found on Earth. Although most meteorites are fragments of hundred have been identified as be
asteroids. Several
asteroids, several
asteroids; several
asteroids: several
ID: 26c8c88c Answer

Correct Answer: B
Rationale
Choice B is the best answer. This choice uses a comma to correctly separate the dependent clause "although…
asteroids" from the independent clause "several hundred have been…Mars."
Choice A is incorrect. This choice results in a sentence fragment. "Although…asteroids" is a dependent clause. It
can’t stand on its own as a sentence, which means it can’t end in a period. Choice C is incorrect. This choice
results in a punctuation error. "Although…asteroids" is a dependent clause and can’t be joined to the independent
clause "several hundred have been…Mars" with a semicolon. A semicolon can only join two independent clauses.
Choice D is incorrect. This choice creates a punctuation error. A colon can only come after an independent clause,
but "although…asteroids" is a dependent clause.

Question ID

Conventions
ID: c06af4d8
Sociologist Alton Okinaka sits on the review board tasked with adding new sites to the Hawai‘i Register of Historic Places, which inclu
single-handedly, however;
single-handedly; however,
single-handedly, however,
single-handedly however
ID: c06af4d8 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the punctuation of a supplementary word or phrase
between two main clauses. This choice correctly uses a comma to separate the supplementary adverb “however”
from the preceding main clause (“Okinaka doesn’t…single-handedly”) and a semicolon to join the next main
clause (“all…culture”) to the rest of the sentence. Further, placing the semicolon after “however” correctly indicates
that the information in the preceding main clause (Okinaka doesn’t make such decisions single-handedly) is
contrary to what might be assumed from the information in the previous sentence (Okinaka sits on the review
board that adds new sites to the Hawaii Register of Historic Places).
Choice B is incorrect because placing the semicolon after “single-handedly” and the comma after “however”
illogically indicates that the information in the next main clause (all historical designations must be approved by a
group of experts) is contrary to the information in the previous clause (Okinaka doesn’t make such decisions
single- handedly). Choice C is incorrect because it results in a comma splice. Commas can’t be used in this way to
punctuate a supplementary word or phrase between two main clauses. Choice D is incorrect because it results in a
run-on sentence. The two main clauses are fused without punctuation and/or a conjunction.

Question ID

ID: f4fd123c
The African Games Co-production Market, one of over 180 annual international conferences supporting video game developmen
promote
are promoting
promotes
have promoted
ID: f4fd123c Answer

Correct Answer: C
Rationale
Choice C is the best answer. The subject of the sentence is “The African Games Co-production Market.” That’s
one market, so it’s a singular noun, which means it needs a singular verb. “Promotes” is the only singular verb
among the choices.
Choice A is incorrect. This choice creates a subject-verb agreement error. The subject “The African Games Co-
production Market” is singular, but the verb “promote” is plural. Choice B is incorrect. This choice creates a subject-
verb agreement error. The subject “The African Games Co-production Market” is singular, but the verb “are
promoting” is plural. Choice D is incorrect. This choice creates a subject-verb agreement error. The subject “The
African Games Co-production Market” is singular, but the verb “have promoted” is plural.


Conventions
ID: 60713427
Polyphenols are organic compounds among their many roles, provide pigment that helps protect plants against ultraviolet radiation
that—
that;
that,
that:
ID: 60713427 Answer

Correct Answer: C
Rationale
sentence. The comma after “that” pairs with the comma after “roles” to separate the supplementary element “among
their many roles” from the rest of the sentence. This supplementary element functions to clarify that polyphenols
have many roles, and the pair of commas indicates that this element could be removed without affecting the
grammatical coherence of the sentence.
Choice A is incorrect because a dash can’t be paired with a comma to separate the supplementary element from the
rest of the sentence. Choice B is incorrect because a semicolon can’t be paired with a comma to separate the
supplementary element from the rest of the sentence. Choice D is incorrect because a colon can’t be paired with a
comma to separate the supplementary element from the rest of the sentence.

Question ID
ID: 7f1df833
In 1966, Emmett Ashford became the first African American to umpire a Major League Baseball game. His energetic gestures annou
bounds helped
bounds, helping
bounds that helped
bounds to help
ID: 7f1df833 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is finite verb use in a main clause. A main clause requires
a finite verb to perform the action of the subject (in this case, Ashford’s “gestures” and “habit”), and this choice
supplies the finite past tense verb “helped” to indicate what Ashford’s gestures and habit helped accomplish.
Choice B is incorrect because the non-finite participle “helping” doesn’t supply the main clause with a finite verb.
Choice C is incorrect because the relative clause “that helped” doesn’t supply the main clause with a finite verb.
Choice D is incorrect because the non-finite to-infinitive “to help” doesn’t supply the main clause with a finite verb.

Question ID
ID: 2ee50d41
The classic children’s board game Chutes and Ladders is a version of an ancient Nepalese game, Paramapada Sopanapata. In both
a player to skip ahead and arrive closer to the end goal.
allows
are allowing
have allowed
allow
ID: 2ee50d41 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is subject–verb agreement. The singular verb “allows”
agrees in number with the singular subject “landing.”
Choice B is incorrect because the plural verb “are allowing” doesn’t agree in number with the singular subject
“landing.” Choice C is incorrect because the plural verb “have allowed” doesn’t agree in number with the singular
subject “landing.” Choice D is incorrect because the plural verb “allow” doesn’t agree in number with the singular
subject “landing.”

Question ID
ID: 15d6d837
Literary agents estimate that more than half of all nonfiction books credited to a celebrity or other public figure are in fact written by
people’s stories
peoples story’s
peoples stories
people’s story’s
ID: 15d6d837 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the use of plural and possessive nouns. The
plural possessive noun “people’s” and the plural noun “stories” correctly indicate that there are multiple
stories from multiple people.
Choice B is incorrect because the context requires the plural possessive noun “people’s” and the plural noun
“stories,” not the plural noun “peoples” and the singular possessive noun “story’s.” Choice C is incorrect because
the context requires the plural possessive noun “people’s,” not the plural noun “peoples.” Choice D is incorrect
because the context requires the plural noun “stories,” not the singular possessive noun “story’s.”

Question ID
ID: 59209b6d
Based on genetic evidence, archaeologists have generally agreed that reindeer domestication began in the eleventh century CE. How
researcher Robert Losey has argued that domestication
researcher Robert Losey’s argument is that domestication
domestication, researcher Robert Losey has argued,
the argument researcher Robert Losey has made is that domestication
ID: 59209b6d Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is subject-modifier placement. This choice makes the
noun phrase “researcher Robert Losey” the subject of the sentence and places it immediately after the modifying
phrase “since…Siberia.” In doing so, this choice clearly establishes that researcher Robert Losey—and not another
noun in the sentence—is who uncovered fragments of a 2,000-year-old reindeer training harness in northern
Siberia.
Choice B is incorrect because it results in a dangling modifier. The placement of the noun phrase “researcher
Robert Losey’s argument” immediately after the modifying phrase illogically suggests that the “argument” is
what uncovered fragments of a 2,000-year-old reindeer training harness in northern Siberia. Choice C is incorrect
because it results in a dangling modifier. The placement of the noun “domestication” immediately after the
modifying phrase illogically suggests that “domestication” is what uncovered fragments of a 2,000-year-old
reindeer training harness in northern Siberia. Choice D is incorrect because it results in a dangling modifier. The
placement of the noun phrase “the argument” immediately after the modifying phrase illogically suggests that the
“argument” is what uncovered fragments of a 2,000-year-old reindeer training harness in northern Siberia.

Question ID

Conventions
ID: 2b512e65
Eli Eisenberg, a genetics expert at Tel Aviv University in Israel, recently discovered that have a special genetic ability called RNA editin
cephalopods, ocean dwellers that include the squid, the octopus, and the cuttlefish
cephalopods—ocean dwellers—that include the squid, the octopus, and the cuttlefish,
cephalopods, ocean dwellers that include: the squid, the octopus, and the cuttlefish,
cephalopods—ocean dwellers that include the squid, the octopus, and the cuttlefish—
ID: 2b512e65 Answer

Correct Answer: D
Rationale
sentence. In this choice, the dash after “cephalopods” pairs with the dash after “cuttlefish” to clearly separate
the supplementary element “ocean dwellers that include the squid, the octopus, and the cuttlefish” from the rest
of the sentence. This supplementary element functions to explain what cephalopds are, and the pair of dashes
indicates that this element could be removed without affecting the grammatical coherence of the sentence.
Choice A is incorrect because it fails to use appropriate punctuation to separate the supplementary element that
explains what cephalopods are from the rest of the sentence. Choice B is incorrect because it fails to use
appropriate punctuation to separate the supplementary element that explains what cephalopods are from the rest of
the sentence. Choice C is incorrect because it fails to use appropriate punctuation to separate the supplementary
element that explains what cephalopods are from the rest of the sentence.

Question ID
ID: 856b495d
In the early twentieth century, Joseph Kekuku and other Hawaiian in the mainland United States to the bright and lilting sound of the
musicians introduced audiences
musicians’ introduced audiences’
musician’s introduced audience’s
musicians’ introduced audiences
ID: 856b495d Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the use of plural nouns. The plural nouns
"musicians" and "audiences" correctly indicate that there were multiple musicians introducing the music to multiple
audiences.
Choice B is incorrect because the context requires the plural nouns "musicians" and "audiences," not the plural
possessive nouns "musicians’" and "audiences’." Choice C is incorrect because the context requires the plural nouns
"musicians" and "audiences," not the singular possessive nouns "musician’s" and "audience’s." Choice D is
incorrect because the context requires the plural noun "musicians," not the plural possessive noun "musicians’."

Question ID
Conventions
ID: 870ae7ec
Detroit natives Timothy Paule and Nicole Lindsey have combined their two passions, Detroit and beekeeping, to improve the healt
apiary,
apiary, and
apiary and
apiary
ID: 870ae7ec Answer

Correct Answer: B
Rationale
Choice B is the best answer. Both clauses in this sentence could stand alone as complete sentences, which
means they are both independent clauses. This choice uses a comma plus a coordinating conjunction to link them
together, which is one of the correct ways to link two independent clauses.
Choice A is incorrect. This choice results in a run-on sentence error. Both clauses in this sentence could stand
alone as complete sentences, which means they are both independent clauses. A comma by itself is not enough
punctuation to link two independent clauses. Choice C is incorrect. This choice results in a run-on sentence
error.
Both clauses in this sentence could stand alone as complete sentences, which means they are both independent
clauses. Independent clauses can only be linked in a few ways, including with a comma plus a coordinating
conjunction. This choice uses the coordinating conjunction “and,” but it is missing the comma beforehand. Choice
D is incorrect. This choice results in a run-on sentence error. Both clauses in this sentence could stand alone as
complete sentences, which means they are both independent clauses. Independent clauses need to have certain
kinds of punctuation marks between them. This choice doesn’t use any punctuation between the two clauses.

Question ID
Conventions
ID: fcaff694
The city of Pompeii, which was buried in ash following the eruption of Mount Vesuvius in 79 CE, continues to be studied by archaeo
researchers, Roberto Scandone and Christopher Kilburn,
researchers, Roberto Scandone and Christopher Kilburn
researchers Roberto Scandone and Christopher Kilburn
researchers Roberto Scandone, and Christopher Kilburn
ID: fcaff694 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the punctuation of a restrictive coordinated noun
phrase. No punctuation is needed within or around the coordinated noun phrase “researchers Roberto Scandone
and Christopher Kilburn” because it would create an illogical separation between the noun “researchers” and
the coordinated noun phrase “Roberto Scandone and Christopher Kilburn.”
Choice A is incorrect because no punctuation is needed. Placing a pair of commas around the coordinated noun
phrase “Roberto Scandone and Christopher Kilburn” creates an illogical separation between the noun
“researchers” and the aforementioned coordinated noun phrase. In this case, it illogically suggests that
researchers in general bear the specific names Roberto Scandone and Christopher Kilburn. Choice B is incorrect
because no punctuation is needed between the noun “researchers” and the coordinated noun phrase “Roberto
Scandone and Christopher Kilburn.” Choice D is incorrect because no punctuation is needed within the
coordinated noun phrase “Roberto Scandone and Christopher Kilburn.”

Question ID
ID: 0fe5ce68
Ten of William Shakespeare’s plays are classified as histories. Although each one of these plays, which include Henry V and Richard I
focuses
focus
are focused
were focused
ID: 0fe5ce68 Answer
Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is subject-verb agreement. The singular verb "focuses"
agrees in number with the singular subject "each one of these plays," which refers to each play individually.
Choice B is incorrect because the plural verb "focus" doesn’t agree in number with the singular subject "each one of
these plays." Choice C is incorrect because the plural verb "are focused" doesn’t agree in number with the singular
subject "each one of these plays." Choice D is incorrect because the plural verb "were focused" doesn’t agree in
number with the singular subject "each one of these plays."

Question ID

Conventions
ID: 790fc366
Using satellite remote sensing, Dr. Catherine Nakalembe, director of NASA’s Harvest Africa initiative, gathers important data on crop
information, though;
information, though,
information; though
information though,
ID: 790fc366 Answer
Correct Answer: A
Rationale
Choice A is the best answer. This choice uses a semicolon to join two independent clauses ("Nakalembe doesn’t just…
though" and "she also shares..."). This choice also appropriately includes "though" in the first clause, where it logically
belongs.
Choice B is incorrect. This choice results in a grammar error called a comma splice. It incorrectly joins two
independent clauses with only a comma instead of a comma and a coordinating conjunction like "and" or "but."
"Though" is a transition word, but it’s not a coordinating conjunction. Choice C is incorrect. This choice results in a
punctuation error. A semicolon can only be used to link two independent clauses. However, if "though" is included
in the second clause, it turns the second clause into a dependent clause, so a semicolon can’t be used after
"information." Choice D is incorrect. This choice results in a grammar error called a comma splice. It incorrectly
joins two independent clauses with only a comma instead of a comma and a coordinating conjunction like "and" or
"but."


Conventions
ID: 62120607
From afar, African American fiber artist Bisa Butler’s portraits look like paintings, their depictions of human faces, bodies, and clothing
quilts, and the
quilts, the
quilts; the
quilts. The
ID: 62120607 Answer
Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is punctuation use between a main clause and a
supplementary phrase. This choice correctly uses a comma to mark the boundary between the main clause (“the
portraits...quilts”) and the supplementary noun phrase (“the stitching...fabric”) that provides a further description of
how the portraits can be identified as quilts.
Choice A is incorrect. A comma and the conjunction “and” can’t be used in this way to join a main clause and a
supplementary noun phrase. Choice C is incorrect because a semicolon can’t be used in this way to join a main
clause and a supplementary noun phrase. Choice D is incorrect because it results in a rhetorically unacceptable
sentence fragment beginning with “the stitching.”

Question ID

Conventions
ID: 2bb7416a
In paleontology, the term “Elvis taxon” gets applied to a newly identified living species that was once presumed to be extinct. Like an
however but it
however it
however, it
however. It
ID: 2bb7416a Answer
Correct Answer: D
Rationale
Choice D is the best answer. The clause “Like an Elvis impersonator…real thing” and the clause “it is…look-alike” are
both independent clauses, so making them into two separate sentences is grammatically correct.
Choice A is incorrect. This choice creates a run-on sentence error. The clause “Like an Elvis impersonator…real
thing” and the clause “it is…look-alike” are both independent clauses, so they need to be separated with at least a
comma + a coordinating conjunction. This choice provides the coordinating conjunction “but,” but it’s missing a
comma. Choice B is incorrect. This choice creates a run-on sentence error. The clause “Like an Elvis impersonator…
real thing” and the clause “it is…look-alike” are both independent clauses, so they need to be separated with a
semicolon, a colon, a dash, a period, or a comma + a coordinating conjunction. Choice C is incorrect. This choice
creates a run-on sentence error. The clause “Like an Elvis impersonator…real thing” and the clause “it is…look-alike”
are both independent clauses, so they need to be separated with at least a comma + a coordinating conjunction. This
choice provides a comma, but it’s missing a coordinating conjunction.

Question ID

ID: 97b62fab
Smaller than poppy seeds, tardigrades are tiny, but they are tough. These minuscule animals can survive for thirty years without food
that
it
they
he
ID: 97b62fab Answer
Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is pronoun-antecedent agreement. The plural pronoun
"they" agrees in number with the plural antecedent "animals," which refers to tardigrades.
Choice A is incorrect because the singular pronoun "that" doesn’t agree in number with the plural antecedent
"animals." Choice B is incorrect because the singular pronoun "it" doesn’t agree in number with the plural
antecedent "animals." Choice D is incorrect because the singular pronoun "he" doesn’t agree in number with the
plural antecedent "animals."

Question ID

Conventions
ID: 89ab0d46
After the printing press was introduced in 1440, handwritten manuscripts from Europe’s medieval period were often destroyed and th
from:
from,
from
from—
ID: 89ab0d46 Answer
Correct Answer: C
Rationale
Choice C is the best answer. The word “from” introduces a prepositional phrase that modifies the noun “pages” and
provides essential information about their origin. No additional punctuation is needed after “from” in this context.
Choice A is incorrect. This choice results in a punctuation error, illogically separating the preposition “from” from
the rest of the prepositional phrase with a colon. Also, a colon can only follow an independent clause, but what
comes before the blank could not stand on its own as a complete sentence. Choice B is incorrect. This choice results
in a punctuation error, illogically separating the preposition “from” from the rest of the prepositional phrase with a
comma. Choice D is incorrect. This choice results in a punctuation error, illogically separating the preposition
“from” from the rest of the prepositional phrase with a dash.

Question ID

Conventions
ID: b0a525be
Santa Clara Pueblo artist Roxanne Swentzell’s sculpture Mud Woman Rolls On consists of five human figures made of clay and plant
Swentzell
Swentzell,
Swentzell:
Swentzell—
ID: b0a525be Answer
Correct Answer: B
Rationale
Choice B is the best answer. The phrase “according to Swentzell” is an aside that interrupts the ow of the sentence,
so it needs to be separated from the sentence with a pair of matching punctuation marks: two commas, two dashes,
or a pair of parentheses. We already have a comma before “according,” so we must add a comma after “Swentzell.” .
Choice A is incorrect. This choice creates a punctuation error. The phrase “according to Swentzell” is an aside that
interrupts the ow of the sentence, so it needs to be separated from the sentence with a pair of matching
punctuation marks: one before and one after the phrase. Choice C is incorrect. This choice creates a punctuation
error. “The arrangement of the figures, according to Swentzell” is not an independent clause, so it can’t come before
a colon. Choice D is incorrect. This choice creates a punctuation error. The phrase “according to Swentzell” is an
aside that interrupts the ow of the sentence, so it needs to be separated from the sentence with a pair of matching
punctuation marks. We already have a comma at the beginning, so we have to use another comma here to match.
We can’t just switch to a dash! .

Question ID

Conventions
ID: eef91a50
Nine months before Rosa Parks made history by refusing to comply with the segregated seating policy on a Montgomery, Alabam
offense. According
offense, according
offense according
offense and according
ID: eef91a50 Answer
Correct Answer: A
Rationale
Choice A is the best answer. “Nine months…offense” and “according to…system” are both independent clauses.
Separating them with a period and turning them into their own sentences is the only grammatically correct choice
among the provided options.
Choice B is incorrect. This choice results in a comma splice error, which is a punctuation error that occurs when
two independent clauses are joined by only a comma. “Nine months…offense” and “according to…system” are both
independent clauses, so they need to be either joined by a semicolon, joined by a comma and a coordinating
conjunction, or separated by a period. Choice C is incorrect. This choice results in a run-on sentence, which occurs
when two independent clauses are joined without punctuation. “Nine months…offense” and “according to…system”
are both independent clauses, so they need to be either joined by a semicolon, joined by a comma and a coordinating
conjunction, or separated by a period. Choice D is incorrect. This choice results in a run-on sentence, which occurs
when two independent clauses are joined without punctuation. “Nine months…offense” and “according to…system”
are independent clauses, so we would need to put a comma before the coordinating conjunction “and” to join them
properly.

Question ID

Conventions
ID: 01a32c84
The first computerized spreadsheet, Dan Bricklin’s VisiCalc, improved financial recordkeeping not only by providing users with an e
adjustments prior
adjustments, prior
adjustments. Prior
adjustments and prior
ID: 01a32c84 Answer
Correct Answer: C
Rationale
period is used correctly to mark the boundary between the first sentence (“The...adjustments”) and the second
sentence (“Prior...days”). Because the adverbial phrase beginning with “prior” indicates when changing a
spreadsheet required redoing the sheet by hand, that phrase belongs with the second sentence.
Choice A is incorrect because it results in a run-on sentence. Two sentences are fused without punctuation and/or a
conjunction. Choice B is incorrect because it results in a comma splice. A comma can’t be used in this way to mark
the boundary between sentences. Choice D is incorrect. Without a comma preceding it, the conjunction “and” can’t
be used in this way to join the sentences.

Question ID

Conventions
ID: 548f4956
It is generally true that technological change is a linear process, in which once-useful technologies are replaced by new and better
ones, even so;
ones even so,
ones; even so,
D. ones, even so,
ID: 548f4956 Answer
Correct Answer: C
Rationale
This choice uses a semicolon in a conventional way to join the first main clause (“It is…ones”) and the second main
clause (“even so…needs”). Furthermore, the placement of the semicolon after “ones” indicates that the
supplementary phrase “even so” modifies the following clause (“the reawakening...needs”), resulting in the most
logical and grammatically

recent interest completelike
in an old technology sentence. With this
steam engines is punctuation, thethat
despite the fact sentence logicallychange
technological indicates that the
typically seeks
out new technologies.
Choice A is incorrect because it results in a confusing and illogical sentence. Placing the semicolon after “so”
indicates that the supplementary element “even so” modifies the first clause of the sentence, which doesn’t make
sense in this context. Choice B is incorrect because it results in a run-on sentence. It fails to mark the boundary
between the two main clauses with appropriate punctuation. Choice D is incorrect because it results in a comma
splice. Without a conjunction following it, a comma can’t be used in this way to join the two main clauses of the
sentence.

Question ID

Conventions
ID: 2c84f96a
In 2017, artists Isabel and Ruben Toledo redesigned the costumes and sets for The Miami City Ballet’s production of The
to reviewers, the Toledos’ designs helped infuse the production with elements of Miami’s Latin American culture.
Nutcracker according,
Nutcracker, according
Nutcracker according
Nutcracker. According
ID: 2c84f96a Answer
Correct Answer: D
Rationale
period is used correctly to mark the boundary between one sentence (“In 2017... Nutcracker”) and another
(“According...culture”). The supplementary element “according to reviewers” modifies the main clause of the second
sentence (“the Toledos’...culture”).
Choice A is incorrect because it results in a run-on sentence. The sentences are fused without punctuation and/or a
conjunction. Furthermore, no punctuation is needed within the supplementary element “according to reviewers.”
Choice B is incorrect because it results in a comma splice. A comma can’t be used in this way to mark the boundary
between sentences. Choice C is incorrect because it results in a run-on sentence. The sentences are fused without
punctuation and/or a conjunction.

Question ID

ID: dd6a0326
African American Percy Julian was a scientist and entrepreneur whose work helped people around the world to see. Named in 199
Julian synthesized the alkaloid physostigmine in 1935; it
in 1935 Julian synthesized the alkaloid physostigmine, which
Julian’s 1935 synthesis of the alkaloid physostigmine
D. the alkaloid physostigmine was synthesized by Julian in 1935 and
ID: dd6a0326 Answer
Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is subject-modifier placement. This choice makes the
noun phrase “Julian’s 1935 synthesis” the subject of the sentence and places it immediately after the modifying
phrase “named…years.” In doing so, this choice clearly establishes that Julian’s 1935 synthesis of the alkaloid
physostigmine—and not another noun in the sentence—was named in 1999 as one of the greatest achievements by a
US chemist in the past hundred years.

Choice A is incorrect because it results in a dangling modifier. The placement of the noun “Julian” immediately
after the modifying phrase illogically suggests that Julian himself was named as one of the greatest
achievements by a US chemist in the past hundred years. Choice B is incorrect because it results in a dangling
modifier. The placement of the prepositional phrase “in 1935” immediately after the modifying phrase illogically and
confusingly suggests that “in 1935” was named as one of the greatest achievements by a US chemist in the past
hundred years. Choice D is incorrect because it results in a dangling modifier. The placement of the noun phrase
“the alkaloid physostigmine” immediately after the modifying phrase illogically and confusingly suggests that
the alkaloid physostigmine itself (not the synthesis of it) was named as one of the greatest achievements by a US
chemist in the past hundred years.

Question ID

Conventions
ID: 4ba99a6f
Seneca sculptor Marie Watt’s blanket art comes in a range of shapes and sizes. In 2004, Watt sewed strips of blankets together to cra
sampler later,
sampler;
sampler,
D. sampler, later,
ID: 4ba99a6f Answer
Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the coordination of main clauses within a sentence.
This choice uses a semicolon in a conventional way to join the first main clause (“In 2004…sampler”) and the second
main clause (“in 2014…pillars”).
used in this way to join two main clauses. The word “later” is an adverb and cannot be used to join two main clauses
unless it is preceded by a conjunction. Choice C is incorrect because it results in a comma splice. Without a
conjunction following it, a comma can’t be used in this way to join two main clauses. Choice D is incorrect
because it results in a comma splice. Without a conjunction following it, a comma can’t be used in this way to
join two main clauses. The word “later” is an adverb and cannot be used to join two main clauses unless it is
preceded by a conjunction.

Question ID

Conventions
ID: ce81d0b7
The life spans of rockfish vary greatly by species. For instance, the colorful calico rockfish (Sebastes dalli) can survive for a little over
decade: while
decade. While
decade; while
decade, while
ID: ce81d0b7 Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is punctuation between a main clause and a subordinate
clause. This choice correctly uses a comma to mark the boundary between the main clause (“the colorful…decade”)
and the subordinate clause (“while…centuries”) that provides contrasting information about the life span of
rougheye rockfish.
Choice A is incorrect because a colon can’t be used in this way to join a main clause and a subordinate
clause. Choice B is incorrect because it results in a rhetorically unacceptable sentence fragment beginning with
“while.” Choice C is incorrect because a semicolon can’t be used in this way to join a main clause and a subordinate
clause.

Question ID

Conventions
ID: db24ecc9
The Arctic-Alpine Botanic Garden in Norway and the Jardim Botânico of Rio de Janeiro in Brazil are two of many botanical gardens aro
species, both native and nonnative,
species, both native and nonnative;
species; both native and nonnative,
D. species both native and nonnative,
ID: db24ecc9 Answer
Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the punctuation of items in a complex series (a series
including internal punctuation). The semicolon after “nonnative” is correctly used to separate the first item
(“growing diverse plant species, both native and nonnative”) and the second item (“fostering scientific research”) in
the series of things that botanical gardens are dedicated to. Further, the comma after “species” is correctly used to
separate
modifies the
it. noun phrase “diverse plant species” and the supplementary phrase “both native and nonnative” that
Choice A is incorrect because a comma (specifically, the comma after “nonnative”) can’t be used in this way to
separate items in a complex series. Choice C is incorrect because a semicolon can’t be used in this way to separate
the noun phrase “diverse plant species” and the supplementary phrase “both native and nonnative” that modifies it.
Further, a comma can’t be used in this way to separate items in a complex series. Choice D is incorrect because it
fails to use appropriate punctuation to separate the noun phrase “diverse plant species” and the supplementary
phrase “both native and nonnative” that modifies it. Further, a comma can’t be used in this way to separate items in
a complex series.

Question ID

ID: 35360da9
The US Geological Survey wants to map every human-made structure in the United States, and it is asking volunteers to help. Cass
contribute
will contribute
have contributed
D. will be contributing
ID: 35360da9 Answer
Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the use of verbs to express tense in a sentence. In this
choice, the present perfect tense verb “have contributed,” used in conjunction with the phrase “since it began in
2012,” correctly indicates that map editors have contributed in the past and continue to do so in the present.
Choice A is incorrect because the present tense verb “contribute” is inconsistent with the phrase “since it began in
2012,” which suggests that the contributions occurred in the past and continue into the present. Choice B is
incorrect because the future tense verb “will contribute” is inconsistent with the phrase “since it began in 2012,”
which suggests that the contributions occurred in the past and continue into the present. Choice D is incorrect
because the future tense verb “will be contributing” is inconsistent with the phrase “since it began in 2012,” which
suggests that the contributions occurred in the past and continue into the present.

Question ID

Conventions
ID: 0fa289a7
In 1955, Indian Bengali filmmaker Satyajit Ray released his first movie, Pather quiet black-and-white drama about a family in rura
Panchali a
Panchali, which was a
Panchali, a
D. Panchali. A
ID: 0fa289a7 Answer
Correct Answer: D
Rationale
period is used correctly to mark the boundary between one sentence ("In…Panchali") and another ("A quiet…time").
The phrase beginning with "a quiet" modifies the subject of the next sentence, "Ray’s film."
Choice A is incorrect because it results in a run-on sentence. The sentences are fused without punctuation and/or a
conjunction. Choice B is incorrect because it results in a comma splice. A comma can’t be used in this way to
mark the boundary between sentences. Choice C is incorrect because it results in a comma splice. A comma can’t be
used in this way to mark the boundary between sentences.

Question ID

ID: 684b8bd2
Far from being modern inventions, more than 5,000 years ago.
Sumerians in ancient Mesopotamia used drinking straws
drinking straws were used by Sumerians in ancient Mesopotamia
the use of drinking straws by Sumerians in ancient Mesopotamia happened
ancient Mesopotamia was home to Sumerians who used drinking straws
ID: 684b8bd2 Answer
Correct Answer: B
Rationale
Choice B is the best answer. Modifiers and their subjects must go next to each other. The modifier “far from being
modern inventions” must be describing “drinking straws,” because those are the only possible inventions in this
sentence.
Choice A is incorrect. Modifiers and their subjects must go next to each other. The modifier “far from being modern
inventions” can’t be describing “Sumerians,” because they are a group of people, not an invention. Choice C is
incorrect. Modifiers and their subjects must go next to each other. The modifier “far from being modern inventions”
can’t be describing “the use of drinking straws,” because it is not “the use” of drinking straws that is an invention—it
is the drinking straws themselves. Choice D is incorrect. Modifiers and their subjects must go next to each other.
The modifier “far from being modern inventions” can’t be describing “Ancient Mesopotamia,” because that is a place,
not an invention.

Question ID

Conventions
ID: f30a478e
A study published by Rice University geoscientist Ming Tang in 2019 offers a new explanation for the origin of Earth’s structures called
continents geological
continents: geological
continents; geological
D. continents. Geological
ID: f30a478e Answer
Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is punctuation use between a main clause and a
supplementary phrase. In this choice, a colon is correctly used to mark the boundary between the main clause (“A
study…continents”) and the supplementary phrase (“geological…above”) and to introduce the following explanation
of the origin of Earth’s continents.
Choice A is incorrect because it fails to mark the boundary between the main clause (“A study…continents”) and the
supplementary phrase (“geological…above”) with appropriate punctuation. Choice C is incorrect because a
semicolon can’t be used in this way to join the main clause (“A study…continents”) and the supplementary phrase
(“geological…above”). A semicolon is conventionally used to join two main clauses, whereas a colon is
conventionally used to introduce an element that explains or amplifies the information in the preceding clause,
making it the better choice in this context. Choice D is incorrect because it results in a rhetorically unacceptable
sentence fragment beginning with “geological.”

Question ID 67667d72

Conventions
ID: 67667d72
Humans were long thought to have begun occupying the Peruvian settlement of Machu Picchu between 1440 and 1450 CE. Howev
earlier. In
earlier, in
earlier, which in
D. earlier in
ID: 67667d72 Answer
Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is punctuation use between sentences. In this choice, the
period is used correctly to mark the boundary between one sentence (“However...earlier”) and another (“In...area”).
The supplementary phrase “in 1420 CE” modifies “humans,” the subject of the third sentence.
Choice B is incorrect because it results in a comma splice. A comma can’t be used in this way to mark the boundary
between sentences. Choice C is incorrect because it results in a comma splice. A comma can’t be used in this way to
mark the boundary between sentences. Moreover, the subordinating conjunction “which” creates a confusing and
illogical sentence that suggests that the supplementary phrase beginning with “in” modifies the previous
information (“However...earlier”) rather than the information that follows. Choice D is incorrect because it results in
a run-on sentence. The sentences (“However...earlier” and “in...area”) are fused without punctuation and/or a
conjunction.

Question ID

ID: dd428136
Cheng Dang and her colleagues at the University of Washington recently ran simulations to determine the extent to which individua
grain’s physical properties’
grains’ physical properties
grains’ physical property’s
grains physical properties
ID: dd428136 Answer
Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the use of plural and possessive nouns. The plural
possessive noun “grains’” and the plural noun “properties” correctly indicate that the simulations involved multiple
snow grains and that those snow grains had several properties.
Choice A is incorrect because the context requires the plural possessive noun “grains’” and the plural noun
“properties,” not the singular possessive noun “grain’s” and the plural possessive noun “properties’.” Choice C is
incorrect because the context requires the plural noun “properties,” not the singular possessive noun “property’s.”
Choice D is incorrect because the context requires the plural possessive noun “grains’,” not the plural noun “grains.”

Question ID

Conventions
ID: 04bfd364
The intense pressure found in the deep ocean can affect the structure of proteins in fish’s cells, distorting the proteins’ shape. The ch
configurations. TMAO
configurations TMAO
configurations, TMAO
D. configurations and TMAO
ID: 04bfd364 Answer
Correct Answer: A
Rationale
period after “configurations” is used correctly to mark the boundary between one sentence (“The intense…
configurations”) and another (“TMAO…fish”). The supplementary phrase (“ensuring…configurations”) modifies the
main clause of the first sentence (“The chemical…effect”), and “TMAO” is the subject of the second sentence.
Choice B is incorrect because it results in a run-on sentence. The sentences (“The intense…configurations” and
“TMAO…fish”) are fused without punctuation and/or a conjunction. Choice C is incorrect because it results in a
comma splice. A comma can’t be used in this way to mark the boundary between sentences. Choice D is incorrect.
Without a comma preceding it, the conjunction “and” can’t be used in this way to join sentences.

Question ID

Conventions
ID: ea8f4658
When particles are suspended in liquid (like pollen in a water glass), they will zigzag randomly through the liquid and collide with o
movement: which
movement, which
movement which
D. movement. Which
ID: ea8f4658 Answer
Correct Answer: B
Rationale
Choice B is the best answer. This choice correctly uses commas to set off the nonessential relative clause "which is
known as Brownian motion" that provides extra information about the "random, continuous movement" that isn’t
necessary for the function of the sentence.
Choice A is incorrect. This choice results in a punctuation error. The relative clause "which is known as Brownian
motion" is a nonessential supplement. Nonessential supplements need to be set apart from the rest of the sentence
with a pair of commas, dashes, or parentheses, so we can’t use a colon here. Also, notice that colons can only
come after an independent clause, which isn’t the case here. Choice C is incorrect. This choice results in a
punctuation error. The relative clause "which is known as Brownian motion" is a nonessential supplement, so it
should be separated from the rest of the sentence by a pair of matching punctuation marks. We already have a
comma after "motion," so we need to add a comma before "which." This choice is missing that comma. Choice D is
incorrect. This choice results in a sentence fragment. "This type of random, continuous movement" is not an
independent clause and can’t stand alone as a full sentence, so we can’t put a period here.

Question ID

ID: 775f3eb9
In his groundbreaking book Bengali Harlem and the Lost Histories of South Asian America, Vivek Bald uses newspaper articles, cens
story’s of the South Asian immigrants
story’s of the South Asian immigrants’
stories of the South Asian immigrants
stories’ of the South Asian immigrant’s
ID: 775f3eb9 Answer
Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the use of plural and possessive nouns. The plural
nouns “stories” and “immigrants” correctly indicate that the memoir tells multiple stories of multiple immigrants.
Choice A is incorrect because the context requires the plural noun “stories,” not the singular possessive noun
“story’s.” Choice B is incorrect because the context requires the plural nouns “stories” and “immigrants,” not the
singular possessive noun “story’s” and the plural possessive noun “immigrants’.” Choice D is incorrect because the
context requires the plural nouns “stories” and “immigrants,” not the plural possessive noun “stories’” and the
singular possessive noun “immigrant’s.”

Question ID

Conventions
ID: b6560e5a
Materials scientist Marie-Agathe Charpagne and her colleagues believed they could improve on the multicomponent alloy NiCoCr
the alloy that resulted, NiCoRu, turned out to be an unsuitable replacement for NiCoCr.
(Ru)
(Ru) but
(Ru),
D. (Ru), but
ID: b6560e5a Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is the coordination of main clauses. This choice
correctly uses a comma and the coordinating conjunction “but” to join the first main clause (“Materials…Ru”) and
the second main clause (“the alloy…NiCoCr”).
and/or a conjunction. Choice B is incorrect because when coordinating two longer main clauses such as these, it’s
conventional to use a comma before the coordinating conjunction. Choice C is incorrect because it results in a

Question ID
SAT Reading and Standard English Form, Structure,

ID: 5b8f9cf2
In the canon of North African literature, Moroccan author Driss Chraïbi’s 1954 novel The Simple Past (Le Passé simple) looms
large. A coming-of-age story, a social meditation, and a sober gaze into the dark maw of French colonialism,
interrogates systemic power with memorable intensity.
A. Morocco gained its independence two years before the publication of Chraïbi’s debut novel, which
B. Chraïbi’s debut novel, published two years before Morocco gained its independence,
C. Chraïbi wrote a debut novel that, published two years before Morocco gained its independence,
D. published two years before Morocco gained its independence, Chraïbi wrote a debut novel that
ID: 5b8f9cf2 Answer
Correct Answer:
B Rationale
Choice B is the best answer. Subject-modifier placement requires a modifier and its subject to be next to each other.
The subject of the modifier "a coming-of-age story…colonialism" is Chraïbi’s novel The Simple Past, so the subject
"Chraïbi’s debut novel" fits perfectly after this introductory modifying phrase.
Choice A is incorrect. Modifiers and their subjects must go next to each other. The introductory modifier "a coming-
of-age story…colonialism" is describing Chraïbi’s novel, not Morocco. However, this choice places Morocco directly
next to that modifier. Choice C is incorrect. Modifiers and their subjects must go next to each other. The introductory
modifier "a coming-of-age story…colonialism" all describes Chraïbi’s novel, not Chraïbi himself. However, this
choice places Chraïbi directly next to that modifier. Choice D is incorrect. Modifiers and their subjects must go next to
each other. The modifier "a coming-of-age story…" is describing Chraïbi’s novel, so that needs to be the subject
immediately after the modifier. This choice adds another modifier that describes Chraïbi’s novel, but then puts
"Chraïbi" himself—not the novel—right after that modifier, which doesn’t make sense. Chraïbi wasn’t "published two
years before" Moroccan independence; his novel The Simple Past was.

Question ID

ID: b5b74c3f
When writing The Other Black Girl (2021), novelist Zakiya Dalila Harris drew on her own experiences working at a publishing office. T
were
have been
has been
D. are
ID: b5b74c3f Answer
Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is subject-verb agreement. The singular verb “has been”
agrees in number with the singular subject “writing.”
Choice A is incorrect because the plural verb “were” doesn’t agree in number with the singular subject “writing.”
Choice B is incorrect because the plural verb “have been” doesn’t agree in number with the singular subject
“writing.” Choice D is incorrect because the plural verb “are” doesn’t agree in number with the singular subject
“writing.”

Question ID

Conventions
ID: 432b1ede
The forty-seven geothermal springs of Arkansas’ Hot Springs National Park are sourced via a process known as natural groundwa
Springs to
Springs: to
Springs—to
D. Springs, to
ID: 432b1ede Answer
Correct Answer: C
Rationale
sentence. The dash after “Springs” pairs with the dash after “earth” to separate the supplementary element “in this
case, the porous rocks of the hills around Hot Springs” from the rest of the sentence.
the rest of the sentence. Choice B is incorrect because a colon can’t be paired with a dash in this way to separate
the supplementary element from the rest of the sentence. Choice D is incorrect because a comma can’t be paired
with a dash in this way to separate the supplementary element from the rest of the sentence.

Question ID

Conventions
ID: c21df211
In 1959, the film industry debuted Smell-O-Vision. Theaters were fitted with specialized vents that emitted odors at specific points in a
movie such
movie; such
movie. Such
D. movie, such
ID: c21df211 Answer
Correct Answer: D
Rationale
Choice D is the best answer. The comma appropriately separates the nonessential descriptive aside "such as…scene"
from the independent clause "Theaters were…movie." Since the descriptive example of roses isn’t necessary for the
sentence to function, it needs to be set off with punctuation.
Choice A is incorrect. This choice results in a run-on sentence. Since the example of roses isn’t necessary for the
sentence to function, the descriptive aside "such as…scene" needs to be separated from the preceding
independent clause with some sort of punctuation. Choice B is incorrect. This choice creates a punctuation error.
A semicolon can only be used to separate two independent clauses, but "such…scene" is not an independent
clause and couldn’t stand on its own as a sentence. Choice C is incorrect. This choice results in a sentence
fragment. The descriptive aside "Such…scene" is not an independent clause and can’t stand on its own as a
sentence.


ID: 50445680
In winter, the diets of Japanese macaques, also known as snow monkeys, are influenced more by food availability than by food pr
forces
to force
forcing
forced
ID: 50445680 Answer
Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the use of finite and nonfinite verb forms within a
sentence. The nonfinite present participle “forcing” is correctly used to form a participial phrase that
supplements the main clause “those...cover,” describing the effects on monkeys of the lack of food sources.
Choice A is incorrect because the finite present tense verb “forces” can’t be used in this way to supplement the
main clause (“those...cover”). Choice B is incorrect. While the nonfinite to-infinitive “to force” could be used to form
a subordinate clause that supplements the main clause (“those...cover”), to-infinitives conventionally express
purpose, and nothing in the sentence suggests that the food sources become unavailable for the purpose of forcing
monkeys to hunt marine animals. Choice D is incorrect because the finite past tense verb “forced” can’t be used
in this way to supplement the main clause (“those...cover”).

Question ID

Conventions
ID: 267a13e2
In 2010, archaeologist Noel Hidalgo Tan was visiting the twelfth-century temple of Angkor Wat in Cambodia when he noticed mark
walls, with
walls with
walls so with
D. walls. With
ID: 267a13e2 Answer
Correct Answer: D
Rationale
period after “walls” is used correctly to mark the boundary between the first sentence (“In...walls”) and the second
sentence (“With…techniques”), which starts with a supplementary phrase.
boundary between sentences. Choice B is incorrect because it results in a run-on sentence. The sentences
(“In...walls” and “with...paintings”) are fused without punctuation and/or a conjunction. Choice C is incorrect.
Without a comma preceding it, the conjunction “so” can’t be used in this way to join sentences.

Question ID

Conventions
ID: 403d7bb5
According to Naomi Nakayama of the University of Edinburgh, the reason seeds from a dying dandelion appear to float in the air
to
falling,
falling:
falling;
D. falling
ID: 403d7bb5 Answer
Correct Answer: D
Rationale
Choice D is the best answer. The word “falling” occurs in the middle of a clause and isn’t part of a supplement, so we
don’t need any punctuation after it. We can see this more clearly if we simplify the rest of the sentence: “The
reason seeds appear to oat while falling is that their plumes enhance drag.” .
CTh
heoiwceorAdi“sfainllcinogrr”eocctc. Turhsisindotheesnm’ticdodmlepolfeatectlhaue stexatnidn
iasnw’tapyatrhtaot fcaonsufoprpmlesmtoentht,escoownevednotnio’tnnseoefdSatnayndpaurndcEtunagtliiosnh. after
it. We can see this more clearly if we simplify the sentence: “The reason seeds appear to oat while falling is
that their plumes enhance drag.” . Choice B is incorrect. This doesn’t complete the text in a way that conforms to
the conventions of Standard English. The word “falling” occurs in the middle of a clause and isn’t part of a
supplement, so we don’t need any punctuation after it. We can see this more clearly if we simplify the sentence:
“The reason seeds appear to oat while falling is that their plumes enhance drag.” . Choice C is incorrect. This
doesn’t complete the text in a way that conforms to the conventions of Standard English. The word “falling”
occurs in the middle of a clause and isn’t part of a supplement, so we don’t need any punctuation after it. We can
see this more clearly if we simplify the sentence: “The reason seeds appear to oat while falling is that their
plumes enhance drag.” .

Question ID

ID: de3dd17d
Planetary scientist Briony Horgan and her colleagues have determined that as much as 25 percent of the sand on Mars is composed
to rain
raining
having rained
D. rain
ID: de3dd17d Answer
Correct Answer: D
Rationale
Choice D is the best answer. "That…[rain] back onto Mars’s surface" is a relative clause that describes the "bits of
molten rock." Forming the clause requires a conjugated, finite verb, and this is the only choice that provides that.
Choice A is incorrect. "To rain" is an infinitive and can’t serve as the main verb of a clause. A conjugated verb is
n e e de d he r e t o f rm th e m a in v e r b o f t h e r e l at i v e c la u e " th a t…
"b i ts o f m o l te n r oc k." Ch o ic e B i s i nc o r r e ct . " R a i n in g " is a p re s
[r ai n ] b a c k on t o M a rs ’ s s u rf a c e ," w h ic h d e c r i be s th e
en t p a r ti c ip le a n d , o n i t s o w n , c a n ’t se r ve a s t h e m a in verb of a clause.
A conjugated verb is needed here to form the main verb of the relative clause "that…[rain] back onto Mars’s surface,"
which describes the "bits of molten rock." Choice C is incorrect. "Having rained" is a perfect participle and can’t
serve as the main verb of a clause. A conjugated verb is needed here to form the main verb of the relative clause
"that…[rain] back onto Mars’s surface," which describes the "bits of molten rock."

Question ID

Conventions
ID: 6b49f5f1
In 1727, dramatist Lewis Theobald presented a new play, Double Falsehood, at a London theater. Theobald claimed that his drama w
skeptical but
skeptical, but
skeptical,
D. skeptical
ID: 6b49f5f1 Answer
Correct Answer: B
Rationale
Choice B is the best answer. There are two independent clauses in the sentence, each with a subject and a verb:
"many...were skeptical" and "historians have determined…." These clauses can be grammatically joined by a comma
and the coordinating conjunction "but."
C h o ic e A i s in c o r r e . T h i s c h o ic e re s u l ts in a r u n - o n e n t e n c ,
j o in e d w it h o u t p u n ctt u a ti o n . T w o in d e p e nd en t c l a u s es
s c an ’ tb e
w h i c h o cc u r s w h e n t w o i n d ep e n d e n t l a u se s a r e
j oi n e d b y ju s t t h e c oo r d in a t in g c o n ju n ct i o n "b u t ." A comma would also be
required. Choice C is incorrect. This choice creates a punctuation error called a comma splice. This sentence
contains two independent clauses ("Many…were skeptical" and "historians have determined…"). A comma alone
can’t join two independent clauses. That requires a comma and a coordinating conjunction. Choice D is incorrect.
This choice results in a run-on sentence, which occurs when two independent clauses are joined without
punctuation. This sentence contains two independent clauses ("Many…were skeptical" and "historians have
determined…"), which need to be either joined by a semicolon, joined by a comma and a coordinating conjunction,
or separated by a period.

Question ID

ID: 2dd1b8bf
Compared to that of alumina glass, silica glass atoms are so far apart that they are unable to re-form bonds after being separated.
silica glass is at a significant disadvantage due to its more dispersed atomic arrangement:
silica glass has a more dispersed atomic arrangement, resulting in a significant disadvantage:
a significant disadvantage of silica glass is that its atomic arrangement is more dispersed:
silica glass’s atomic arrangement is more dispersed, resulting in a significant disadvantage:
ID: 2dd1b8bf Answer
Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is subject-modifier placement. This choice makes “silica
glass’s atomic arrangement” the subject of the sentence and places it immediately after the modifying phrase
“compared to that of alumina glass.” In doing so, this choice clearly establishes that silica glass’s atomic
arrangement—and not another noun in the sentence—is being compared to the atomic arrangement (“that”) of
alumina glass.
Choice A is incorrect because it results in a dangling modifier. The placement of the noun phrase “silica glass”
immediately after the modifying phrase illogically suggests that silica glass itself (rather than its atomic
arrangement) is being compared to alumina glass’s atomic arrangement. Choice B is incorrect because it results in
a dangling modifier. The placement of the noun phrase “silica glass” immediately after the modifying phrase
illogically suggests that silica glass itself (rather than its atomic arrangement) is being compared to alumina
glass’s atomic arrangement. Choice C is incorrect because it results in a dangling modifier. The placement of the
noun phrase “a significant disadvantage” immediately after the modifying phrase illogically suggests that “a
significant disadvantage” is being compared to alumina glass’s atomic arrangement.

Question ID

Conventions
ID: 577b09fa
Robin Wall Kimmerer of the Citizen Potawatomi Nation is a bryologist, a plant scientist who specializes in mosses. To Kimmerer, mos
themselves;
themselves,
themselves. And
D. themselves
ID: 577b09fa Answer
Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the punctuation of items in a series. The comma after
“themselves” is used conventionally to separate the first item (“they can clone themselves”) and the second item
(“enter a dormant state in times of drought”) in the series of things mosses can do.
A i s a
Choice C i s incorrect because i t
s m i c ol o n c a n ’ b e u s e d i t h is w y t o s e p a r a t i te m s
re
es u l ts i n a r h e to r ic a l ly u na c c ep ta bl e s e n t e n c e f r a gm
i a s i m p le s er ie s s u c h as this.
e nt b e g in n in g w it h “ A n d enter.” Choice D is incorrect because it fails to use appropriate
punctuation to separate the first and second items in the series.

Question ID 59094d87

Conventions
ID: 59094d87
The Tantaquidgeon Museum in Uncasville, Connecticut, was founded in 1931 with the goal of showcasing the culture and history of the
Tribe, and
Tribe
Tribe and
D. Tribe,
ID: 59094d87 Answer
Correct Answer: A
Rationale
Choice A is the best answer. This choice uses a comma and a coordinating conjunction (“and”) to join two
independent clauses (“The Tantaquidgeon…Tribe” and “Today…country”).
Choice B is incorrect. This choice results in a grammar error known as a run-on sentence. The clauses before and
after “Tribe”
incorrect. Thisare both independent,
choice so they error
results in a grammar need to be separated
known withsentence.
as a run-on some sort of clauses
The punctuation. Choice
before C is“and”
and after
are both
independent, so they can’t be linked with just a conjunction. A comma would also be required. Choice D is incorrect.
This choice results in a grammar error called a comma splice. The clauses before and after “Tribe” are both
independent, so they can’t be linked with just a comma. A coordinating conjunction like “and” or “but” would also be
required.

Question ID

ID: 0ff8477b
Food and the sensation of taste are central to Monique Truong’s novels. In The Book of Salt, for example, the exiled character of Bìn
experienced
had experienced
experiences
D. will be experiencing
ID: 0ff8477b Answer
Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the use of verbs to express tense. In this choice, the
present tense verb “experiences” is consistent with the other present tense verbs (e.g., “connects” and
“prepares”) used to describe the events in Truong’s novels. Furthermore, it’s conventional to use the present
tense when discussing a literary work.
Choice A is incorrect because the past tense verb “experienced” isn’t consistent with the other present tense verbs
used to describe the events in Truong’s novels. Choice B is incorrect because the past perfect tense verb “had
experienced” isn’t consistent with the other present tense verbs used to describe the events in Truong’s novels.
Choice D is incorrect because the future progressive tense verb “will be experiencing” isn’t consistent with the
other present tense verbs used to describe the events in Truong’s novels.

Question ID

ID: b260c65a
Earth is not a perfect sphere. Due to the gravitational pull, Earth bulges out on the sides closest to and farthest from the Moon. This d
Moon’s
Moons
Moons’
D. Moon
ID: b260c65a Answer
Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the use of possessive nouns. The singular possessive
noun "Moon’s" correctly indicates that there is only one Moon, and it has a gravitational pull.
Choice B is incorrect because the context requires the singular possessive noun "Moon’s," not the plural noun
"Moons."
possessiveChoice C is incorrect
noun "Moons’." because
Choice the context
D is incorrect requires
because thethe singular
context possessive
requires noun "Moon’s,"
the singular possessivenot the"Moon’s,"
noun plural
not the singular noun "Moon."

Question ID

ID: 9f737b2a
In Death Valley National Park’s Racetrack Playa, a flat, dry lakebed, are 162 rocks—some weighing less than a pound but others almo
playas sediment mark the rock’s
playa’s sediment mark the rocks
playa’s sediment mark the rocks’
D. playas’ sediment mark the rocks’
ID: 9f737b2a Answer
Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the use of plural and possessive nouns. The singular
possessive noun “playa’s” and the plural possessive noun “rocks’” correctly indicate that the sediment is that of one
playa (the Racetrack Playa) and that there are multiple rocks that have mysteriously migrated across the sediment.
Choice A is incorrect
noun “rocks’,” not thebecause the context
plural noun requires
“playas” and thethe singular
singular possessive
possessive noun
noun “playa’s”
“rock’s.” and the
Choice B isplural possessive
incorrect because
the context requires the plural possessive noun “rocks’,” not the plural noun “rocks.” Choice D is incorrect because
the context requires the singular possessive noun “playa’s,” not the plural possessive noun “playas’.”

Question ID

ID: c52652c9
The human brain is primed to recognize faces—so much so that, due to a perceptual tendency called pareidolia, will even find faces in
she
they
it
D. those
ID: c52652c9 Answer

Correct Answer: C
Rationale
Choice C is the best answer. "It" is a singular pronoun used to stand in for objects. Since the antecedent in this
case is the singular noun phrase "the human brain," "it" is a perfect pronoun to use here.
Choice A is incorrect. Although "she" is a singular pronoun, it is reserved for people and animals, not objects like
"the human brain." Choice B is incorrect. "They" is a plural pronoun, but we need a singular pronoun to represent
the antecedent "the human brain." Choice D is incorrect. "Those" is a plural pronoun, but we need a singular
pronoun to
represent the antecedent "the human brain."

Question ID

Conventions
ID: ba8ebf49
The poem Beowulf begins with the word “hwæt,” which is an Old English as “hark!” or “listen!” in some versions, the word was playf
exclamation, translated
exclamation and translated
exclamation translated
exclamation. Translated
ID: ba8ebf49 Answer

Correct Answer: D
Rationale
period is used correctly to mark the boundary between one sentence ("The poem…exclamation") and another
sentence that begins with a supplementary element ("Translated…poem"). The supplementary element "translated
as ‘hark!’ or ‘listen!’ in some versions" modifies the subject of the second sentence, "the word" (referring to
hwæt).
Choice A is incorrect because it results in a comma splice after "exclamation." A comma can’t be used in this way
to mark the boundary between sentences. Choice B is incorrect. Without a comma preceding it, the conjunction
"and"
can’t be used in this way to join sentences. Choice C is incorrect because it results in a comma splice after
"versions." A comma can’t be used in this way to mark the boundary between sentences.

Question ID
Assessment
Test Domain Skill Difficulty
SAT
Reading and Standard English Form, Structure,
ID: 188f7e3c
In 2016, engineer Vanessa Galvez oversaw the installation of 164 bioswales, vegetated channels designed to absorb and
divert stormwater, along the streets of Queens, New York. By reducing the runoff flowing into city sewers,
A. the mitigation of both street flooding and the resulting pollution of nearby waterways has been achieved by bioswales.
B. the bioswales have mitigated both street flooding and the resulting pollution of nearby waterways.
C. the bioswales’ mitigation of both street flooding and the resulting pollution of nearby waterways has been achieved.
D. both street flooding and the resulting pollution of nearby waterways have been mitigated by bioswales.
ID: 188f7e3c Answer
Correct Answer:
B Rationale
Choice B is the best answer. The convention being tested is subject-modifier placement. This choice makes the
noun phrase “the bioswales” the subject of the sentence and places it immediately after the modifying phrase
“By reducing…sewers.” In doing so, this choice clearly establishes that the bioswales—and not another noun in
the sentence—are reducing runoff owing into city sewers.
Choice A is incorrect because it results in a dangling modifier. The placement of the noun phrase “the mitigation…
waterways” immediately after the modifying phrase results in unclear modification. The resulting sentence makes
it hard to determine what is responsible for “reducing the runoff”: the bioswales or some other noun in the
sentence. Choice C is incorrect because it results in a dangling modifier. The placement of the noun phrase “the
bioswales’ mitigation…waterways” immediately after the modifying phrase results in unclear modification. The
resulting sentence makes it hard to determine what is responsible for “reducing the runoff”: the bioswales or some
other noun in the sentence. Choice D is incorrect because it results in a dangling modifier. The placement of the
noun phrase “street ooding and the resulting pollution” immediately after the modifying phrase illogically
suggests that the “ooding and pollution” are reducing runoff owing into city sewers.

ID: 36944347
Official measurements of the Mississippi River’s length vary: according to the US Geologic Survey, the river is 2,300 miles long, wh
they accumulate
one accumulates
it accumulates
D. we accumulate
ID: 36944347 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The noun that goes with "expand and contract" is "rivers," a plural noun. "They"
is a third-person plural pronoun, so it can correctly stand in for "rivers."
Choice B is incorrect. This choice creates a pronoun-antecedent agreement error. "One" is a singular pronoun, but
the noun that goes with "expand and contract" is "rivers," a plural noun. Choice C is incorrect. This choice
creates a pronoun-antecedent agreement error. "It" is a singular pronoun, but the noun that goes with "expand
and contract"
is "rivers," a plural noun. Choice D is incorrect. This choice creates a pronoun-antecedent agreement error. The
noun that goes with "expand and contract" is the plural noun "rivers." Rivers are not people, so "we" can’t be used
to stand in for it.

Question ID
Conventions
ID: a466679a
In 1976, the Inuit rock group Sikumiut recorded the album People of the Ice. Though only their first record, it shows a band already
blend, with
blend. With
blend; with
D. blend with
ID: a466679a Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is punctuation between a verb and a prepositional
phrase. No punctuation is needed between the verb “blend” and the prepositional phrase “with Charlie Adams’s
delightfully catchy vocal melodies.” The prepositional phrase completes the idea of the sentence, explaining with
what Koperqualuk’s guitar riffs blend.
Choice A is incorrect because no punctuation is needed between the verb and the prepositional phrase. Choice B is
incorrect because no punctuation is needed between the verb and the prepositional phrase. Choice C is
incorrect because no punctuation is needed between the verb and the prepositional phrase.

Question ID
Conventions
ID: a8fa749a
Nigerian author Buchi Emecheta’s celebrated literary oeuvre includes The Joys of Motherhood, a novel about the changing roles o
Lagos, A Kind of Marriage,
Lagos; A Kind of Marriage,
Lagos, A Kind of Marriage:
D. Lagos; A Kind of Marriage
ID: a8fa749a Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the punctuation of items in a complex series (a series
including internal punctuation). In this choice, the semicolon after “Lagos” is conventionally used to separate the
first item (“The Joys…Lagos”) and the second item (“ A Kind…Nigeria”) in the series. Further, the comma after
“Marriage” correctly separates the title “A Kind of Marriage” from the supplementary phrase (“a television…
Nigeria”)
that describes it.
Choice A is incorrect because the comma after “Lagos” doesn’t match the semicolon used later in the series to
separate the second item (“A Kind…Nigeria”) from the third item (“and…autobiography”). Choice C is incorrect
because the comma after “Lagos” doesn’t match the semicolon used later in the series to separate the second item
(“A Kind…Nigeria”) from the third item (“and…autobiography”). Additionally, a colon can’t be used in this way to
separate the title “A Kind of Marriage” from the supplementary phrase (“a television…Nigeria”) that describes it.
Choice D is incorrect because it fails to use appropriate punctuation to separate the title “A Kind of Marriage”
from the supplementary phrase (“a television…Nigeria”) that describes it.

Question ID
ID: 898f182c
Richard Spikes was a prolific African American inventor known for his contributions to automotive engineering. Between 1907 an
included
includes
including
D. will include
ID: 898f182c Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the use of nonfinite verb forms within a sentence. The
nonfinite present participle "including" is correctly used to form a participial phrase that supplements the main
clause "he patented many inventions," listing several of Spikes’s patented inventions.
Choice A is incorrect because the finite past tense verb "included" can’t be used in this way to supplement the main
clause "he patented many inventions." Choice B is incorrect because the finite present tense verb "includes" can’t
be
used in this way to supplement the main clause "he patented many inventions." Choice D is incorrect because the
finite future tense verb "will include" can’t be used in this way to supplement the main clause "he patented many
inventions."

Question ID
ID: 6e5bf3a8
Even though bats prefer very sweet nectar, the plants that attract them have evolved to produce nectar that is only moderately sweet
explains
explaining
having explained
D. to explain
ID: 6e5bf3a8 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the use of finite and nonfinite verb forms within a
sentence. A main clause requires a finite verb to perform the action of the subject (in this case, “a recent study”),
and this choice supplies the finite present tense verb “explains” to indicate that the study explains why plants that
attract bats have evolved to produce moderately sweet nectar.
Choice B is incorrect because the nonfinite participle “explaining” doesn’t supply the main clause with a finite
verb. Choice C is incorrect because the nonfinite participle “having explained” doesn’t supply the main clause
with a finite verb. Choice D is incorrect because the nonfinite to-infinitive “to explain” doesn’t supply the main
clause with a finite verb.

Conventions
ID: 84658166
In 1943, in the midst of World War II, mathematics professor Grace Hopper was recruited by the US military to help the war effort by
equations, though:
equations, though,
equations. Though,
D. equations though
ID: 84658166 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the use of punctuation to mark boundaries between
supplements and clauses. The comma after “equations” is used to separate the independent clause (“Hopper’s…
equation”) from the supplementary adverb phrase “though.” The colon after “though” is used to mark the boundary
between the clause ending with “though” and the following clause (“as…age”). A colon used in this way introduces
information that illustrates or explains information that has come before it. In this case, the colon after “though”
introduces the following explanation of how Hopper’s subsequent career would involve more than just solving
equations: she would become a pioneering computer programmer.
Choice B is incorrect because it results in a comma splice. A comma can’t be used in this way to join two
independent clauses (“Hopper’s…though” and “as…age”) such as these. Choice C is incorrect because it results in
an illogical sequence of sentences. Placing the period after “equations” and beginning the next sentence with
“Though” illogically suggests that the following information (that Hopper would help usher in the digital age) is
contrary to the information in the previous sentence (Hopper’s subsequent career would involve more than just
solving equations). Instead, the information that follows supports the information from the previous sentence by
explaining how her work and inuence extended beyond solely solving equations. Choice D is incorrect because it
results in a
run-on sentence. The two independent clauses (“Hopper’s…though” and “as…age”) are fused without punctuation.
Question Difficulty:
Question ID
ID: 7c48a6dd
In the late 1960s, inspired in part by the sight of laundry hanging on a clothesline, African American abstract painter Sam Gilliam b
to have suspended
suspending
to suspend
D. suspended
ID: 7c48a6dd Answer

Correct Answer: D
Rationale
Choice D is the best answer. The past tense of "suspended" matches the past tense of "applied," which has the same
subject ("he") and takes place in the same context: "He applied…and [he] suspended."
Choice A is incorrect. The perfect infinitive "to have suspended" doesn’t match the past tense of "applied," and it
can’t serve as a verb on its own. These are both verbs with the same subject and in the same context, so there’s
no need to shift tenses. Choice B is incorrect. The present participle "suspending" doesn’t match the past tense of
"applied," and it can’t serve as a verb on its own. These are both verbs with the same subject and in the same
context, so there’s no need to shift tenses. Choice C is incorrect. The infinitive "to suspend" doesn’t match the
past tense of "applied," and it can’t serve as a verb on its own. These are both verbs with the same subject and in
the same context, so there’s no need to shift tenses.

Question ID

Conventions
ID: 5cc85f01
A conceptual artist and designer embraced by both the art world and the fashion Mary Ping was chosen to curate the exhibition Fron
world
world:
world;
world,
ID: 5cc85f01 Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is punctuation between a supplementary phrase and a
main clause. This choice correctly uses a comma to mark the boundary between the supplementary phrase (“A
conceptual artist…world”), which describes Mary Ping, and the main clause (“Mary…America”).
Choice A is incorrect because it fails to mark the boundary between the supplementary phrase (“A conceptual
artist…world”) and the main clause (“Mary…America”) with appropriate punctuation. Choice B is incorrect because a
colon can’t be used in this way to join the supplementary phrase (“A conceptual artist…world”) and the main clause
(“Mary…America”). In this context, the colon incorrectly suggests that the information in the supplementary phrase
is an explanation or amplification of the information in the main clause (Mary Ping being chosen to curate the
exhibition), which isn’t the case. Choice C is incorrect because a semicolon can’t be used in this way to join the
supplementary phrase (“A conceptual artist…world”) and the main clause (“Mary…America”). Semicolons are
conventionally used to separate two main clauses or to separate items in a complex series.

Question ID

ID: 8d53e7a0
Slam poet Elizabeth Acevedo’s debut novel The Poet X, winner of the 2018 National Book Award for Young People’s Literature, is
poems putatively written by the novel’s
poem’s putatively written by the novel’s
poem’s putatively written by the novels’
poems putatively written by the novels’
ID: 8d53e7a0 Answer

Correct Answer: A
Rationale
Choice A is the best answer. Nothing belongs to the “poems” in the sentence, so it should not be possessive—just a
simple plural noun. The protagonist does belong to the novel—it’s the protagonist of the novel—so “novel” needs
to be a singular possessive noun.
Choice B is incorrect. This doesn’t complete the text in a way that conforms to the conventions of Standard
English.
This choice uses the singular possessive “poem’s,” but the text indicates that it should be the simple plural “poems”:
there is more than one poem, and nothing belongs to the poems. Choice C is incorrect. This doesn’t complete the
text in a way that conforms to the conventions of Standard English. This choice uses the singular possessive
“poem’s,” but the text indicates that it should be the simple plural “poems”: there is more than one poem, and
nothing belongs to the poems. This choice also uses the plural possessive “novels’,” which is incorrect because
there is only one novel. Choice D is incorrect. This doesn’t complete the text in a way that conforms to the
conventions of Standard English. This choice uses the plural possessive “novels’,” which is incorrect because
there is only one novel, so it should be the singular possessive “novel’s.” .

Question ID

Conventions
ID: cabe71d4
Both Sona Charaipotra, an Indian American, and Dhonielle Clayton, an African American, grew up frustrated by the lack of diverse
company,
company that
company
company, that
ID: cabe71d4 Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the use and punctuation of an integrated relative
clause. This choice correctly uses the relative pronoun “that” and no punctuation to create an integrated relative
clause that provides essential information about the noun phrase (“a book packaging company”) that it modifies.
Choice A is incorrect because it doesn’t use a relative pronoun to link the verb phrase beginning with
“specializes” to the noun phrase that it modifies (“a book packaging company”). Choice C is incorrect because
it doesn’t use a relative pronoun to link the verb phrase beginning with “specializes” to the noun phrase that it
modifies (“a book packaging company”). Choice D is incorrect because no punctuation is needed between the
integrated relative clause beginning with “that specializes” and the noun phrase that it modifies (“a book
packaging company”).

Question ID

ID: 61160f0a
Author Madeline L’Engle, to create a suspenseful tone that draws the reader in, begins her novel A Wrinkle in Time
with descriptions of “wraithlike shadows” and “the frenzied lashing of the wind.”
looked
looks
is looking
looking
ID: 61160f0a Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is the use of verb forms within a sentence. The nonfinite
present participle verb “looking” is correctly used to form a subordinate clause that describes the intent behind
how L’Engle begins her novel.
Choice A is incorrect because the finite past tense verb “looked” can’t be used in this way to form a subordinate
clause. Choice B is incorrect because the finite present tense verb “looks” can’t be used in this way to form a
subordinate clause. Choice C is incorrect because the finite present progressive tense verb “is looking” can’t be used
in this way to form a subordinate clause.

Question ID
Conventions
ID: 7b950fc2
In 2000, Nora de Hoyos Comstock, herself an owner of a successful consulting firm, sought to increase Latina representation in cor
served as a resource and information network for Latina business professionals.
settings she
settings, she
settings and she
D. settings. She
ID: 7b950fc2 Answer

Correct Answer: D
Rationale
Choice D is the best answer. It appropriately uses a period to mark the end of one independent clause ("In 2000…
settings") and the start of another ("She founded…professionals").
Choice A is incorrect. This choice results in a run-on sentence error. Both the clause before the blank ("In 2000…
settings") and the clause after the blank ("she…professionals") are independent clauses, so they need to be separated
by punctuation. Choice B is incorrect. This choice results in a comma splice error. It incorrectly joins two
independent clauses with just a comma. Linking two independent clauses with a comma also requires the use of a
coordinating conjunction (like for, and, nor, but, or, yet, or so). Choice C is incorrect. This choice results in a run-
on sentence, an error caused when two independent clauses are joined without punctuation or appropriate
conjunctions. Since both the clause before the blank ("In 2000…settings") and the clause after the blank ("she…
professionals") are independent, a comma would be required in addition to the coordinating conjunction "and."

Question ID
ID: 75f49353
The Progressive Era in the United States witnessed the rise of numerous Black women’s clubs, local organizations that advocated for
Era Club of Boston.
was
were
are
D. have been
ID: 75f49353 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested here is subject-verb agreement. The singular verb “was”
agrees in number with the singular subject “Josephine St. Pierre Ruffin.”
Choice B is incorrect because the plural verb “were” doesn’t agree in number with the singular subject “Josephine
St. Pierre Ruffin.” Choice C is incorrect because the plural verb “are” doesn’t agree in number with the singular
subject “Josephine St. Pierre Ruffin.” Choice D is incorrect because the plural verb “have been” doesn’t agree in
number with the singular subject “Josephine St. Pierre Ruffin.”

Question ID
Conventions
ID: 1b97cce9
Hegra is an archaeological site in present-day Saudi Arabia and was the second largest city of the Nabataean Kingdom (fourth ce
the rocky outcrops of a vast desert, these burial chambers seem to blend seamlessly with nature.
tombs. Built
tombs, built
tombs and built
D. tombs built
ID: 1b97cce9 Answer

Correct Answer: A
Rationale
period after “tombs” is used correctly to mark the boundary between one sentence (“Archaeologist...tombs”) and
another (“Built...nature”).
Choice B is incorrect because it results in a comma splice. A comma can’t be used in this way to mark the
boundary between sentences. Choice C is incorrect. Without a comma preceding it, the conjunction “and” can’t be
used in this
way to join the two sentences. Choice D is incorrect because it results in a run-on sentence. The sentences
(“Archaeologist...tombs” and “Built...nature”) are fused without punctuation and/or a conjunction.

Question ID
ID: fff4c7f4
American poet Emily Dickinson wrote many of her poems on scraps of paper, but she also took steps to collect these works. From
fascicles).
them
this
that
D. it
ID: fff4c7f4 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The pronoun "them" agrees with the plural antecedents "poems" and "works."
Choice B is incorrect. "This" is a singular pronoun, but its antecedents, "poems" and "works," are plural. Choice C
is incorrect. "That" is a singular pronoun, but its antecedents, "poems" and "works," are plural. Choice D is
incorrect. "It"
is a singular pronoun, but its antecedents, "poems" and "works," are plural.
Question ID

Conventions
ID: 40c3589d
Luci Tapahonso is the inaugural poet laureate of the Navajo Nation. Her book Sáanii Dahataal/The Women Are Singing—a
combination of fiction and memoir, poetry and serves as a testament to her versatility as a writer.
prose;
prose
prose,
prose—
ID: 40c3589d Answer

Correct Answer: D
Rationale
Choice D is the best answer. “A combination of fiction and memoir, poetry and prose” is a nonessential
supplement, so it needs to be set off from the rest of the sentence with a pair of matching punctuation marks. We
already have a dash at the beginning of the supplement, so we need to add a dash at the end of the supplement to
match.
Choice A is incorrect. This doesn’t complete the text in a way that conforms to the conventions of Standard
English.
“A combination of fiction and memoir, poetry and prose” is a nonessential supplement, so it needs to be set off
from the rest of the sentence with a pair of matching punctuation marks. We already have a dash at the beginning
of the
supplement, so we need to add a dash at the end of the supplement to match. Choice B is incorrect. This doesn’t
complete the text in a way that conforms to the conventions of Standard English. “A combination of fiction and
memoir, poetry and prose” is a nonessential supplement, so it needs to be set off from the rest of the sentence with
a pair of matching punctuation marks. We already have a dash at the beginning of the supplement, so we need to
add a dash at the end of the supplement to match. Choice C is incorrect. This doesn’t complete the text in a way
that conforms to the conventions of Standard English. “A combination of fiction and memoir, poetry and prose” is
a nonessential supplement, so it needs to be set off from the rest of the sentence with a pair of matching
punctuation marks. We already have a dash at the beginning of the supplement, so we need to add a dash at the
end of the supplement to match.

Question ID
Conventions
ID: b15724fc
American writer Edwidge Danticat, who emigrated from Haiti in 1981, has won acclaim for her powerful short stories, novels, and her
Danticat to Nobel Prize–winning novelist Toni Morrison.
essays, praising
essays and praising
essays praising
D. essays. Praising
ID: b15724fc Answer

Correct Answer: D
Rationale
period after “essays” is used correctly to mark the boundary between one sentence (“American…essays”) and another
(“praising…Morrison”). The participial phrase beginning with “Praising” modifies the subject of the second sentence,
“writer Robert Antoni.”
boundary between sentences. Choice B is incorrect. Without a comma preceding it, the conjunction “and” can’t be
used in this way to join sentences. Choice C is incorrect because it results in a run-on sentence. The sentences
(“American… essays” and “Praising…Morrison”) are fused without punctuation and/or a conjunction.

Question ID
ID: c5d39bc7
Scientists believe that, unlike most other species of barnacle, turtle barnacles (Chelonibia testudinari) can dissolve the cement-like sec
the shell’s surface.
it
themselves
them
D. itself
ID: c5d39bc7 Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is pronoun-antecedent agreement. The plural reexive
pronoun “themselves” agrees in number with the plural antecedent “turtle barnacles,” correctly indicating what is
attached to a sea turtle shell.
Choice A is incorrect because the singular pronoun “it” doesn’t agree in number with the plural antecedent “turtle
barnacles.” Choice C is incorrect because it results in an unclear and confusing sentence. In this context, it’s
unclear
what the plural pronoun “them” refers to. Choice D is incorrect because the singular reexive pronoun “itself”
doesn’t agree in number with the plural antecedent “turtle barnacles.”

Question ID

ID: e2759b92
Occupying a significant part of modern-day Nigeria, the Kingdom of Benin was one of the major powers in West Africa
between the thirteenth and nineteenth centuries. It ruled by Oba Ewuare I from 1440 to 1473.
is
will be
has been
was
ID: e2759b92 Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is the use of verbs to express tense in a sentence. In this
choice, the past tense verb “was ruled” correctly indicates that Oba Ewuare I ruled the Kingdom of Benin in the
distant past (from 1440 to 1473). This past tense verb choice is consistent with the other past tense verb (“was”)
used to describe the Kingdom of Benin.
Choice A is incorrect because the present tense verb “is ruled” doesn’t indicate that Oba Ewuare I ruled the
Kingdom of Benin in the distant past. Choice B is incorrect because the future tense verb “will be ruled” doesn’t
indicate that
Oba Ewuare I ruled the Kingdom of Benin in the distant past. Choice C is incorrect because the present perfect
tense verb “has been ruled” doesn’t indicate that Oba Ewuare I ruled the Kingdom of Benin in the distant past.

Question ID
Conventions
ID: 594b4a94
The field of geological oceanography owes much to American Marie Tharp, a pioneering oceanographic cartographer whose detailed
of plate tectonics and continental drift.
geologist,
geologist
geologist;
D. geologist:
ID: 594b4a94 Answer

Correct Answer: B
Rationale
Choice B is the best answer. “Marie tharp” is essential information that completes the first clause — the first clause
doesn’t function without it. So we don’t want to separate it with punctuation.
Choice A is incorrect. This choice creates a punctuation error. “The field of geological oceanography owes much to
American geologist” is unclear: which geologist are we talking about? We need the “Marie Tharp” for clarity,
which means it’s essential information and should not be separated by a comma. Choice C is incorrect. This choice
creates
a punctuation error. “The field of geological oceanography owes much to American geologist” is unclear: which
geologist are we talking about? We need the “Marie Tharp” for clarity, which means it’s essential information and
should not be separated by a semicolon. Choice D is incorrect. This choice creates a punctuation error. “The field
of geological oceanography owes much to American geologist” is unclear: which geologist are we talking about?
We need the “Marie Tharp” for clarity, which means it’s essential information and should not be separated by a
colon.

Question ID
Conventions
ID: 2fd05c15
In crafting her fantasy fiction, Nigerian-born British author Helen Oyeyemi has drawn inspiration from the classic nineteenth- centu
Snow White, while her 2019 novel offers a delicious twist on the classic tale of Hansel and Gretel.
Gingerbread—
Gingerbread,
Gingerbread
D. Gingerbread:
ID: 2fd05c15 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is punctuation between a subject and a verb. When, as in
this case, a subject (“her 2019 novel Gingerbread”) is immediately followed by a verb (“offers”), no punctuation
is needed.
Choice A is incorrect because no punctuation is needed between the subject and the verb. Choice B is incorrect
because no punctuation is needed between the subject and the verb. Choice D is incorrect because no punctuation is
needed between the subject and the
verb. Question Difficulty: Hard

Question ID

ID: 175df826
In the 2011 documentary The Barber of Birmingham, civil rights activist James Armstrong recounts how his barbershop in
Birmingham, Alabama, as a political hub for members of the Black community during the 1950s.
serving
having served
served
to serve
ID: 175df826 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the use of verb forms within a sentence. Relative
clauses, such as the one beginning with "how," require a finite (tensed) verb, a verb that can function as the main
verb of a clause. This choice correctly supplies the clause with the finite past tense verb "served."
Choice A is incorrect because it results in an ungrammatical sentence. The nonfinite participle "serving" doesn’t
supply the clause with a finite verb. Choice B is incorrect because it results in an ungrammatical sentence. The
nonfinite participle "having served" doesn’t supply the clause with a finite verb. Choice D is incorrect because it
results in an ungrammatical sentence. The nonfinite to-infinitive "to serve" doesn’t supply the clause with a finite
verb.

Question ID
Conventions
ID: c8540a5b
Swedish scientists Eva Engvall and Peter Perlmann developed a method for measuring the concentration of different proteins in a bi
indicate the presence of certain diseases.
method (called
method—called
method, called
D. method called
ID: c8540a5b Answer

Correct Answer: C
Rationale
sentence. The comma after “method” pairs with the comma after the closing parenthesis to separate the
supplementary element “called ELISA (enzyme-linked immunosorbent assay)” from the rest of the sentence. This
supplementary element functions to identify the name of Engvall and Perlmann’s method, and the pair of commas
indicates that this element could be removed without affecting the grammatical coherence of the sentence.
Choice A is incorrect because an opening parenthesis can’t be paired with a comma to separate the
supplementary element from the rest of the sentence. Choice B is incorrect because a dash can’t be paired with a
comma to separate the supplementary element from the rest of the sentence. Choice D is incorrect because it fails
to use appropriate punctuation to separate the supplementary element from the rest of the sentence.

Question ID

Conventions
ID: e15c50b2
A standard Argo float, a type of autonomous robot, measures temperature and salinity in the upper regions of ice-free
oceans. More advanced floats can measure a wider range of and monitor seasonal ice zones.
variables: travel to greater depths
variables, travel to greater depths,
variables travel to greater depths,
variables, travel to greater depths;
ID: e15c50b2 Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the punctuation of items in a series. The comma after
“variables” is used conventionally to separate the first and second items in the series, and the comma after
“depths” is used conventionally to separate the second and third items.
Choice A is incorrect because a colon can’t be used in this way to separate items in a simple series. Choice C is
incorrect because a comma is needed after “variables” to separate the first and second items in the series. Choice D
is incorrect because a semicolon can’t be used in this way to separate items in a simple series.

Question ID
ID: 988c78eb
Former First Lady of the United States Eleanor Roosevelt and Indian activist and educator Hansa Mehta were instrumental in drafting
people are entitled.
have outlined
were outlining
outlines
D. outline
ID: 988c78eb Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is subject-verb agreement. The singular verb “outlines”
agrees in number with the singular subject “document.”
Choice A is incorrect because the plural verb “have outlined” doesn’t agree in number with the singular subject
“document.” Choice B is incorrect because the plural verb “were outlining” doesn’t agree in number with the singular
subject “document.” Choice D is incorrect because the plural verb “outline” doesn’t agree in number with the singular
subject “document.”


Conventions
ID: 96499989
Fans of science fiction will multiple references to classic sci-fi stories in Janelle Monáe’s song lyrics, including her
recurring nods to the plot of the 1927 sci-fi film Metropolis.
appreciate the
appreciate. The
appreciate, the
appreciate: the
ID: 96499989 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested here is punctuation between a verb and object. No
punctuation is needed between the verb ("appreciate") and its object ("the multiple references..."). The object helps
complete the idea of the verb—in this case, it explains what fans of science fiction will appreciate—and any
punctuation between the two results in an ungrammatical sentence.
Choice B is incorrect because no punctuation is needed between the verb and its object. Choice C is incorrect
because no punctuation is needed between the verb and its object. Choice D is incorrect because no punctuation is
needed between the verb and its object.

Question ID
Conventions
ID: fdb16e20
Quantum particles of light—photons—provide an unhackable means of transmitting encryption keys over networks, as attempts to o
transmit.
and in the process,
and, in the process,
and in the process—
D. and, in the process
ID: fdb16e20 Answer

Correct Answer: B
Rationale
Choice B is the best answer. This choice uses paired punctuation in the form of two commas to set off the
nonessential phrase "in the process."
Choice A is incorrect. The phrase "in the process" is a nonessential element and needs to be set off with paired
punctuation. We need a comma after "and" to match the one after "process." Choice C is incorrect. The phrase "in
the process" is a nonessential element and needs to be set off with paired punctuation, so we would need a dash
after
"and" to match the one following "process." Choice D is incorrect. The phrase "in the process" is a nonessential
element and needs to be set off with paired punctuation. We would need a comma after "process" to match the one
following "and."

Question ID
Conventions
ID: 4565a53c
Lucía Michel of the University of Chile observed that alkaline soils contain an insoluble form of iron that blueberry plants cannot ab
solubilization, Michel was determined to find out.
could the blueberries thrive.
the blueberries could thrive.
the blueberries could thrive?
D. could the blueberries thrive?
ID: 4565a53c Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is end-of-sentence punctuation. This choice correctly
uses a question mark to punctuate the interrogative clause “could the blueberries thrive,” which asks a direct
question at the end of the sentence.
Choice A is incorrect because a period can’t be used in this way to punctuate an interrogative clause, such as
“could the blueberries thrive,” at the end of a sentence. Choice B is incorrect because the context requires an
interrogative
clause. The declarative clause “the blueberries could thrive” incorrectly indicates that it was known that the
blueberries could thrive in alkaline soil, whereas Michel had yet to find this out. Choice C is incorrect because a
question mark can’t be used in this way to punctuate a declarative clause, such as “the blueberries could thrive,”
at the end of a sentence.

Question ID

ID: 7a0d9031
In many of her landscape paintings from the 1970s and 1980s, Lebanese American artist Etel Adnan worked to capture the essence
paintings.
are
have been
were
is
ID: 7a0d9031 Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is subject–verb agreement. The singular verb “is” agrees in
number with the singular subject “the triangle.”
Choice A is incorrect because the plural verb “are” doesn’t agree in number with the singular subject “the triangle.”
Choice B is incorrect because the plural verb “have been” doesn’t agree in number with the singular subject “the
triangle.” Choice C is incorrect because the plural verb “were” doesn’t agree in number with the singular subject “the
triangle.”

Question ID
Conventions
ID: 91fbd59d
Award-winning cinematographer James Wong Howe was known for his innovative filming techniques. While filming a boxing matc
A. (1947), and
B. (1947),
C. (1947) and
D. (1947)
ID: 91fbd59d Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is punctuation between a supplementary element and a
main clause. This choice correctly uses a comma to mark the boundary between the supplementary phrase
(“While...1947”), which indicates when the action occurred, and the main clause (“Howe had a handheld camera
operator wear roller skates”).
Choice A is incorrect because a comma paired with the conjunction “and” can’t be used in this way to mark the
boundary between the supplementary element (“While…1947”) and the main clause (“Howe…skates”). Choice C is
incorrect because the conjunction “and” can’t be used in this way to join the supplementary element (“While…1947”)
and the main clause (“Howe…skates”). Choice D is incorrect because it fails to mark the boundary between the
supplementary element and the main clause with appropriate punctuation.

Question ID
ID: d46ac7e7
A second-generation Japanese American, Wataru Misaka in World War II (1941-45) and won two amateur national basketball champio
already served
was already serving
already serves
D. had already served
ID: d46ac7e7 Answer

Correct Answer: D
Rationale
Choice D is the best answer. Misaka served in World War II before he joined the New York Knicks in 1947. To
show that a past occurrence took place before another past occurrence, we need to use “had” + the past tense
form of the verb. This is called the past perfect tense.
Choice A is incorrect. Misaka served in World War II before he joined the Knicks. Both events are in the past, but
his service in World War II happened earlier, so we need a verb that makes it clear that his service (and the two
national
championships) had ended by the time he joined the Knicks. Choice B is incorrect. “Was already serving” forms
the continuous past tense, which we use when we’re showing a past action that was ongoing. Misaka served in
World War II before he joined the Knicks. Both events are in the past, but they’re not happening at the same time,
so we shouldn’t use the continuous past tense here. Choice C is incorrect. Misaka served in World War II in the
past, so we shouldn’t use the present tense “serves.”

Question ID
Conventions
ID: b1e8b87f
Winding through the ice atop Norway’s Jotunheim Mountains is the Lendbreen pass, an ancient route that was used by hunters, f
knives, horseshoes, wool tunics, and thousands of other artifacts from the icy pass.
unearthed:
unearthed,
unearthed—
D. unearthed
ID: b1e8b87f Answer

Correct Answer: D
Rationale
Choice D is the best answer. No punctuation should separate the verb "unearthed" and its objects (i.e, what was
"unearthed"): "knives, horseshoes, wool tunics, and thousands of other artifacts."
Choice A is incorrect. This choice creates a punctuation error, separating the verb "unearthed" from its objects (i.e,
what was "unearthed") with a colon. Choice B is incorrect. This choice creates a punctuation error, separating the
verb "unearthed" from its objects (i.e, what was "unearthed") with a comma. Choice C is incorrect. This choice
creates a punctuation error, separating the verb "unearthed" from its objects (i.e, what was "unearthed") with a dash.

Question ID 3595a991
ID: 3595a991
In 1930, Japanese American artist Chiura Obata depicted the natural beauty of Yosemite National Park in two memorable woodcuts:
it was
they were
this was
some were
ID: 3595a991 Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is pronoun–antecedent agreement. The plural pronoun
“they” agrees in number with the plural antecedent “woodcuts” and clearly identifies what was exhibited at the
Smithsonian American Art Museum.
Choice A is incorrect because the singular pronoun “it” doesn’t agree in number with the plural antecedent
“woodcuts.” Choice C is incorrect because the singular pronoun “this” doesn’t agree in number with the plural
antecedent “woodcuts.” Choice D is incorrect because the plural pronoun “some” is illogical in this context (referring
to “some” of two woodcuts).

Question ID
Conventions
ID: 1ee4485c
Journalists have dubbed Gil Scott-Heron the “godfather of rap,” a title that has appeared in hundreds of articles about him since the
nickname, however
nickname, however;
nickname, however,
nickname; however,
ID: 1ee4485c Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is punctuation use between a main clause and two
supplementary elements. In this choice, the commas after “nickname” and “however” are correctly used to
separate the supplementary adverb “however” from the main clause (“Scott-Heron…nickname”) on one side and
the supplementary participial phrase (“feeling…bluesologist”) on the other.
Choice A is incorrect because it fails to mark the boundary between the supplementary adverb “however” and
the supplementary phrase (“feeling…bluesologist”). Choice B is incorrect because a semicolon can’t be used in this
way to join the supplementary adverb “however” and the supplementary phrase (“feeling…bluesologist”). Choice D
is incorrect because a semicolon can’t be used in this way to join the main clause (“Scott-Heron…nickname”)
and the supplementary word and phrase (“however” and “feeling…bluesologist”). Moreover, placing the semicolon
after “nickname” illogically signals that the following information (Scott-Heron’s feeling that the nickname
didn’t encapsulate his devotion to the blues tradition) is contrary to the information in the previous clause (Scott-
Heron’s resistance to the nickname).

Question ID
ID: 31362d2d
If simple sugars such as ribose and glycolaldehyde Earth from elsewhere and survived impact—a possibility astrophysicist Nicolle Zelln
reach
had reached
will reach
are reaching
ID: 31362d2d Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the use of verbs to express tense. In this choice, the
past perfect verb “had reached” is used correctly to describe a past action that was completed before another
action in the past. Specifically, in this hypothetical scenario about the origins of RNA and DNA on Earth, the
simple sugars had to have reached Earth before they could react with other molecules on the planet.
Choice A is incorrect because the present tense verb “reach” doesn’t indicate that the simple sugars reached
Earth before reacting with other molecules on the planet. Choice C is incorrect because the future tense verb
“will reach” doesn’t indicate that the simple sugars reached Earth before reacting with other molecules on the
planet. Choice D is incorrect because the present progressive verb “are reaching” doesn’t indicate that the
simple sugars reached Earth before reacting with other molecules on the planet.

Question ID
ID: d2cf0e11
Inventor John Friedman created a prototype of the first flexible straw by inserting a screw into a paper straw and, using dental floss,
screw’s thread’s.
screws’ threads.
screw’s threads.
screws threads’.
ID: d2cf0e11 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the use of plural and possessive nouns. The
singular possessive noun “screw’s” and the plural noun “threads” correctly indicate that there is only one screw
and it has multiple threads.
Choice A is incorrect because the context requires the plural noun “threads,” not the singular possessive noun
“thread’s.” Choice B is incorrect because the context requires the singular possessive noun “screw’s,” not the plural
possessive noun “screws’.” Choice D is incorrect because the context requires the singular possessive noun
“screw’s” and the plural noun “threads,” not the plural noun “screws” or the plural possessive noun “threads.’”

Question ID
ID: 1d971f75
Photographer Ansel Adams’s landscape portraits are iconic pieces of American art. However, many of the of landscapes were intende
photographer’s early photo’s
photographers early photo’s
photographer’s early photos
photographers early photos
ID: 1d971f75 Answer

Correct Answer: C
Rationale
Choice C is the best answer. There’s only one photographer (Adams), and the photos are his, so the singular
possessive "photographer’s" is correct. There’s more than one photo, and nothing belongs to the photos, so the
simple plural "photos" is correct.
Choice A is incorrect. This choice uses the singular possessive "photo’s," which isn’t correct. There’s more than
one photo, and they don’t possess anything, so the noun should be the simple plural "photos." Choice B is
incorrect. This
choice uses the simple plural "photographers" and the singular possessive "photo’s," which aren’t correct. There’s
only one photographer (Adams) and there’s more than one photo. Choice D is incorrect. This choice uses the
simple plural "photographers," which isn’t correct. There’s only one photographer (Adams).

Question ID
ID: f40ca576
Each year in the fall, when the weather starts to cool in the northern hemisphere, millions of North American monarch butterflies jou
flew
were flying
had flown
fly
ID: f40ca576 Answer

Correct Answer: D
Rationale
present tense verb “y” is consistent with the other present tense verb ( “journey”) used to describe the
butteries’ yearly migration. Together, these simple present tense verbs correctly indicate that the migration is
a current, yearly occurrence.
Choice A is incorrect. The simple past tense verb “ew” isn’t consistent with the other present tense verb used to
describe the butteries’ yearly migration. Choice B is incorrect. The past progressive tense verb “were ying” isn’t
consistent with the other present tense verb used to describe the butteries’ yearly migration. Choice C is incorrect.
The past perfect tense verb “had own” isn’t consistent with the other present tense verb used to describe the
butteries’ yearly migration.

Question ID
Conventions
ID: c101fc44
How do scientists determine what foods were eaten by extinct hominins such as Neanderthals? In the past, researchers were limited
new: sequencing
new; sequencing
new, sequencing:
new. Sequencing
ID: c101fc44 Answer

Correct Answer: A
Rationale
Choice A is the best answer. “A team…tried something new” is an independent clause leading to an explanation
of what the new thing was. A colon can only be used at the end of an independent clause, and typically introduces
further explanation that expands upon the first clause, which makes a colon the perfect choice here.
Choice B is incorrect. This choice results in a punctuation error. “Sequencing…dental plaque” can’t stand on its
own as a sentence, and so it can’t be linked to the independent clause “a team…tried something new” with a
semicolon.
Only two independent clauses can be connected in this way. Choice C is incorrect. This choice results in a
punctuation error. If “sequencing” is included in the first clause, it can no longer stand on its own as a complete
idea. Since a colon can only come at the end of an independent clause, using one in this way creates an error.
Choice D is incorrect. This choice results in a sentence fragment. “Sequencing…dental plaque” can’t stand on its
own as a sentence.

Question ID
ID: 0bcb4417
Oglala Lakota poet Layli Long Soldier’s star quilt poems offer an unusually open-ended reading experience. With eight panels of t
their
it’s
they’re
its
ID: 0bcb4417 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the use of possessive determiners. The plural
possessive determiner "their" agrees in number with the plural noun "the poems," thus indicating that the poems
had eight panels of text stitched together in the shape of a traditional eight-pointed Lakota star quilt.
Choice B is incorrect because "it’s" is the contraction for "it is" or "it has," not a possessive determiner. Choice C is
incorrect because "they’re" is the contraction for "they are," not a possessive determiner. Choice D is incorrect
becausethe singular possessive determiner "its" doesn’t agree in number with the plural noun "the poems."

Question ID
Conventions
ID: dddfa043
Before the Erie Canal was completed in 1825, transporting goods by wagon between New York City and the Midwest took up to fo
Erie; the
Erie (the
Erie, the
Erie: the
ID: dddfa043 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is punctuation between a supplementary phrase and a
main clause. This choice correctly uses a comma to mark the boundary between the introductory supplementary
phrase (“By linking the Hudson River to Lake Erie”), which identifies how the canal reduced transport time, and
the main clause (“the canal reduced transport time to nine days and cut costs to six dollars per ton”).
Choice A is incorrect because a semicolon can’t be used in this way to mark the boundary between a supplementary
phrase (“By…Erie”) and the main clause (“the canal...ton”). Choice B is incorrect because an open parenthesis can’t
be used in this way to mark the boundary between a supplementary phrase (“By…Erie”) and the main clause (“the
canal...ton”). Choice D is incorrect because a colon can’t be used in this way to mark the boundary between an
introductory supplementary phrase (“By…Erie”) and the main clause (“the canal...ton”).

Question ID
Conventions
ID: be37d4ae
During the English neoclassical period (1660–1789), many writers imitated the epic poetry and satires of ancient Greece and Rome. Th
antiquity, however
antiquity, however,
antiquity, however;
antiquity; however,
ID: be37d4ae Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the punctuation of a supplementary phrase following
a clause. This choice uses a comma to separate the supplementary adverb phrase “however” from the
independent clause it modifies (“They …antiquity”) and uses a semicolon to join the first independent clause (“They
…antiquity”) and the second independent clause (“some…literature”). Further, placing the semicolon after
“however” indicates that the information in the clause that this part of (that neoclassical writers were not the first
to adopt classical literary modes) is contrary to what might be assumed from the information in the previous
sentence (that the neoclassical writers were unique in imitating classical epic poetry and satires).
Choice A is incorrect because it fails to mark the boundary after “however” between the two independent clauses
with appropriate punctuation. Choice B is incorrect because the comma after “however” can’t be used in this way
to mark the boundary between the two independent clauses. Choice D is incorrect because placing the semicolon
after “antiquity” illogically indicates that the information in the clause that this part of (that prominent Renaissance
figures were also inuenced by classical literature) is contrary to the information in the previous clause (that
neoclassical writers were not the first to adopt classical literary modes).
Question ID
ID: c8607bdf
“Praise Song for the Day,” Elizabeth Alexander’s 2009 inaugural poem, asserts that “We cross dirt roads and highways…to see what’s
evokes
are evoking
have evoked
evoke
ID: c8607bdf Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is subject-verb agreement. The singular verb "evokes"
agrees in number with the singular subject "Alexander’s use."
Choice B is incorrect because the plural verb "are evoking" doesn’t agree in number with the singular subject
"Alexander’s use." Choice C is incorrect because the plural verb "have evoked" doesn’t agree in number with the
singular subject "Alexander’s use." Choice D is incorrect because the plural verb "evoke" doesn’t agree in number
with the singular subject "Alexander’s use."

Question ID
Conventions
ID: 5aae2475
Stomata, tiny pore structures in a leaf that absorb gases needed for plant growth, open when guard cells surrounding each pore sw
biologist, Yuree Lee
biologist Yuree Lee,
biologist Yuree Lee
biologist, Yuree Lee,
ID: 5aae2475 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the use of punctuation between titles and proper nouns.
No punctuation is needed to offset the proper noun “Yuree Lee” form the title “plant cell biologist” that describes Lee.
Choice D is incorrect because no punctuation is needed around the proper noun “Yuree Lee.” Setting the phrase off
with punctuation suggests that it could be removed without affecting the coherence of the sentence, which isn’t the
case.

Question ID
ID: 4c9a2aee
Wanda Diaz-Merced is an astrophysicist who lost her sight when she was young. Diaz-Merced’s condition inspired her to develop
has enabled
enable
is enabling
enables
ID: 4c9a2aee Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is subject-verb agreement. The plural verb "enable"
agrees in number with the plural subject "sound-based tools."
Choice A is incorrect because the singular verb "has enabled" doesn’t agree in number with the plural subject
"sound-based tools." Choice C is incorrect because the singular verb "is enabling" doesn’t agree in number with the
plural subject "sound-based tools." Choice D is incorrect because the singular verb "enables" doesn’t agree in
number
with the plural subject "sound-based
tools." Question Difficulty: Easy

Question ID
ID: db2e480a
By the time Hawaiian king Kamehameha III the throne, the number of longhorn cattle, first introduced to the islands in 1793, had
ascended
will ascend
ascends
is ascending
ID: db2e480a Answer

Correct Answer: A
Rationale
Choice A is the best answer. "Ascended" is in the simple past tense. Since Kamehameha became king in the past,
this makes the most sense.
Choice B is incorrect. "Will ascend" is in the future tense, but we wouldn’t know about Kamehameha III’s ascent if it
hadn’t happened yet. The information in the sentence, as well as the tense of other verbs, tells us that the events
described happened in the past. Choice C is incorrect. "Ascends" is in the simple present tense. However, the
information in the sentence, as well as the tense of other verbs, tells us that the events described happened in
the past. Choice D is incorrect. "Is ascending" is in the continuous present tense, which we use to show that
something is ongoing, but this doesn’t make sense here—the information in the sentence, as well as the tense of
other verbs, tells us that the events described happened in the past.

Question ID
ID: a30567fd
Nuhād al-Ḥaddād, known as Fairuz, was one of the most beloved Lebanese singers of the twentieth century. Her broad singing re
earned
had earned
earning
earn
ID: a30567fd Answer

Correct Answer: C
Rationale
Choice C is the best answer. The word "earning" is being used to introduce an additional modifying phrase,
which describes how Fairuz’s repertoire lent her cross-generational appeal. When a verb ends in -ing and
doesn’t have a helper verb like "is" before it, it can be used to modify a noun or verb. This is appropriate here.
Choice A is incorrect. The underlined verb is being used to introduce additional descriptive information, which
is set off from the rest of the sentence by a comma. Because there is no subject here, a finite form of the verb
(like
"earned") creates an error. We need another form of the verb that doesn’t require a subject and can introduce
descriptive information. Choice B is incorrect. The underlined verb is being used to introduce additional
descriptive information, which is set off from the rest of the sentence by a comma. Because there is no subject
here, a finite form of the verb (like "had earned") creates an error. We need another form of the verb that doesn’t
require a subject and can introduce descriptive information. Choice D is incorrect. The underlined verb is being
used to introduce additional descriptive information, which is set off from the rest of the sentence by a comma.
Because there is no subject here, a finite form of the verb (like "earn") creates an error. We need another form of
the verb that doesn’t require a subject and can introduce descriptive information.
Question ID 329255db

ID: 329255db
Bengali author Toru Dutt’s A Sheaf Gleaned in French Fields (1876), a volume of English translations of French poems,
scholars’ understanding of the transnational and multilingual contexts in which Dutt lived and worked.
has enhanced
are enhancing
have enhanced
enhance
ID: 329255db Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is subject-verb agreement. The singular verb “has
enhanced” agrees in number with the singular subject “A Sheaf Gleaned in French Fields, ” which is the title of a
book of poems.
Choice B is incorrect because the plural verb “are enhancing” doesn’t agree in number with the singular subject “A
Sheaf Gleaned in French Fields.” Choice C is incorrect because the plural verb “have enhanced” doesn’t agree in
number with the singular subject “A Sheaf Gleaned in French Fields .” Choice D is incorrect because the plural verb
“enhance” doesn’t agree in number with the singular subject “A Sheaf Gleaned in French Fields .”


Conventions
ID: 603755a5
In 1959, marine biologist Dr. Albert Jones founded the Underwater Adventure Seekers, a scuba diving that is the oldest club for Blac
club
club,
club—
club, and
ID: 603755a5 Answer

Correct Answer: A
Rationale
Choice A is the best answer. “That is…field” is an essential supplement, so we should not use punctuation to
separate it from “scuba diving club.” .
Choice B is incorrect. This choice creates a punctuation error. “That is…field” is an essential supplement, so we
should not use a comma (or any kind of punctuation) to separate it from “scuba diving club.” . Choice C is incorrect.
This choice creates a punctuation error. “That is…field” is an essential supplement, so we should not use a dash (or
any kind of punctuation) to separate it from “scuba diving club.” . Choice D is incorrect. This choice creates a run-
on sentence. It makes “that is…United States” into an awkward independent clause, but it also makes “that has…
field”
into its own awkward independent clause without the correct punctuation separating it.

Question ID
Conventions
ID: ad046778
To humans, it does not appear that the golden orb-weaver spider uses camouflage to capture its the brightly colored arachnid seems
prey, rather,
prey rather,
prey, rather;
prey; rather,
ID: ad046778 Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is the coordination of main clauses within a sentence. The
semicolon is correctly used to join the first main clause (“To humans…prey”) and the second main clause (“rather…
approach”). Further, the comma after the adverb “rather” is correctly used to separate the adverb from the main
clause (“the brightly…approach”) it modifies, logically indicating that the information in this clause (how the spider’s
behavior appears to humans) is contrary to the information in the previous clause (how the spider’s behavior does
not appear to humans).
used in this way to join two main clauses. Choice B is incorrect because it results in a run-on sentence. The two
main clauses are fused without appropriate punctuation and/or a conjunction. Choice C is incorrect. Placing the
comma between the first main clause “To humans…prey” and the adverb “rather” illogically indicates that the
information in the first main clause is contrary to what came before, which doesn’t make sense in this context.

Question ID
Conventions
ID: 7ce4ee13
After immigrating from Mexico and obtaining U.S. citizenship, Octaviano Ambrosio Larrazolo entered politics, earning a reputatio
New Mexico and
New Mexico,
New Mexico, and
New Mexico
ID: 7ce4ee13 Answer

Correct Answer: C
Rationale
This choice correctly uses a comma and the coordinating conjunction "and" to join the first main clause ("In 1919
Larrazolo was elected governor of New Mexico") and the second main clause ("in 1928 he became the nation’s
first Hispanic US Senator").
Choice A is incorrect because when coordinating two longer main clauses such as these, it’s conventional to use
a comma before the coordinating conjunction. Choice B is incorrect because it results in a comma splice.
Without a conjunction following it, a comma can’t be used in this way to join two main clauses. Choice D is
incorrect because it results in a run-on sentence. The two main clauses are fused without punctuation and/or a
conjunction.

Conventions
ID: 0a114526
In 1937, Chinese American screen actor Anna May Wong, who had portrayed numerous villains and secondary characters but neve
critic, Stina Chyn, claims
critic, Stina Chyn, claims,
critic Stina Chyn claims
critic Stina Chyn, claims,
ID: 0a114526 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The conventions being tested are punctuation use between titles and proper nouns and
between verbs and integrated quotations. No punctuation is needed to set off the proper noun “Stina Chyn” from
the title that describes Chyn, “critic.” Because “Stina Chyn” is essential information identifying the “critic,” no
punctuation is necessary. Further, no punctuation is needed between the verb “claims” and the following
quotation because the quotation is integrated into the structure of the sentence.
Choice A is incorrect because no punctuation is needed before or after the proper noun “Stina Chyn.” Setting the
critic’s name off with commas suggests that it could be removed without affecting the coherence of the sentence,
which isn’t the case. Choice B is incorrect because no punctuation is needed before or after the proper noun
“Stina Chyn.” Setting the critic’s name off with commas suggests that it could be removed without affecting the
coherence of the sentence, which isn’t the case. Additionally, no punctuation is needed between “claims” and
the integrated quotation. Choice D is incorrect because no punctuation is needed between the verb “claims” and
its subject, “critic Stina Chyn.” Additionally, no punctuation is needed between the verb “claims” and the
integrated quotation.

Question ID
ID: 42cc9236
If you try on one of artist Nick Cave’s signature Soundsuits, you can expect to swish, rustle, or clang every time you move. Cave m
this
that
these
it
ID: 42cc9236 Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested here is pronoun-antecedent agreement. The singular
pronoun "it" agrees in number with the singular antecedent "object."
Choice A is incorrect. The singular pronoun "this" is used to refer to a specific thing, but here there is no specific
object being referred to. Instead, the sentence is referring back to a hypothetical object that Cave might use in
a Soundsuit. Choice B is incorrect. The singular pronoun "that" is used to refer to a specific thing, but here there
is no specific object being referred to. Instead, the sentence is referring back to a hypothetical object that Cave
might use in a Soundsuit. Choice C is incorrect because the plural pronoun "these" doesn’t agree in number with
the singular
antecedent "object."

Question ID
ID: 81ac953e
In 1899, Swedish chemist Svante Arrhenius developed an equation to answer a long-standing question: why do chemical reactions spe
have remained
remain
remains
are remaining
ID: 81ac953e Answer

Correct Answer: C
Rationale
Choice C is the best answer. This choice uses the singular verb "remains" to match the singular subject "equation."
Choice A is incorrect. The singular noun "equation" doesn’t match with the plural verb conjugation "have
remained." Choice B is incorrect. The singular noun "equation" doesn’t match with the plural verb conjugation
"remain." Choice D is incorrect. The singular noun "equation" doesn’t match with the plural verb conjugation "are
remaining."

ID: 50801257
In 1994, almost 200 years after the death of Wang Zhenyi, the International Astronomical the contributions of the barrier-breaking 18
Union would finally acknowledge
Union to finally acknowledge
Union, having finally acknowledged
Union, finally acknowledging
ID: 50801257 Answer

Correct Answer: A
Rationale
Choice A is the best answer. It’s the only choice that offers a form of the verb “acknowledge” that can go with the
subject “International Astronomical Union” to make a complete sentence. This might seem like an odd use of
“would,” but when speaking from a point of view in the past, we can actually use “would” to express something
that happened later. That’s the case here: 200 years after Wang Zhenyi’s death, the IAU would finally acknowledge
her contributions.
Choice B is incorrect. This choice creates a sentence fragment. There’s no main verb elsewhere in the sentence,
so we need a form of the verb “acknowledge” that can go with the subject “the International Astronomical
Union” and serve as that main verb. “To acknowledge” can’t do that. Choice C is incorrect. This choice creates
a sentence fragment. There’s no main verb elsewhere in the sentence, so we need a form of the verb
“acknowledge” that can go with the subject “the International Astronomical Union” and serve as that main verb.
“Having acknowledged” can’t do that. Choice D is incorrect. This choice creates a sentence fragment. There’s no
main verb elsewhere in the sentence, so we need a form of the verb “acknowledge” that can go with the subject
“the International Astronomical Union” and serve as that main verb. The “-ing” form can’t do that.
Question ID 1f39ab8b

Conventions
ID: 1f39ab8b
In the novel Things Fall Apart by Chinua Achebe, Okonkwo is a leader of Umuofia (a fictional Nigerian clan) and takes pride in his c
Umuofia’s traditions will be affected.
will Umuofia’s traditions be affected.
Umuofia’s traditions will be affected?
will Umuofia’s traditions be affected?
ID: 1f39ab8b Answer

Correct Answer: D
Rationale
Choice D is the best answer. The clause before the colon tells us that the novel “asks a question,” so the clause
after the colon should be in the conventional form of a question: with the verb before the subject, and a question
mark at the end.
Choice A is incorrect. This choice ends the sentence with a period, which isn’t right. The clause before the colon
tells us that the novel “asks a question,” so the clause after the colon should be that question. Choice B is
incorrect. This choice ends the sentence with a period, which isn’t right. The clause before the colon tells us
that the novel “asks a question,” so the clause after the colon should be that question. In Standard English,
questions place the verb before the subject and end with a question mark. Choice C is incorrect. This choice
doesn’t conform to the conventions of Standard English. In Standard English, questions place the verb before the
subject.

Question ID a14eef71

ID: a14eef71
In 2015, a team led by materials scientists Anirudha Sumant and Diana Berman succeeded in reducing the coefficient of friction (CO
when their COF drops below 0.01, two surfaces reach superlubricity.
two surfaces, when their COF drops below 0.01, reach superlubricity.
reaching superlubricity occurs when two surfaces’ COF drops below 0.01.
superlubricity is reached when two surfaces’ COF drops below 0.01.
ID: a14eef71 Answer

Correct Answer: D
Rationale
Choice D is the best answer. The subject of the modifier “a nearly frictionless state” is “superlubricity.” Subject-
modifier placement requires a modifier and its subject to be next to one another, so “superlubricity” must be the
first word in the missing clause.
Choice A is incorrect. This choice creates a subject-modifier placement error. The subject of the modifier “a
nearly frictionless state” is “superlubricity.” Subject-modifier placement requires a modifier and its subject to be
next to one another, so “superlubricity” must be the first word in the missing clause. Choice B is incorrect. This
choice creates a subject-modifier placement error. The subject of the modifier “a nearly frictionless state” is
“superlubricity.” Subject- modifier placement requires a modifier and its subject to be next to one another, so
“superlubricity” must be the first word in the missing clause. Choice C is incorrect. This choice creates a subject-
modifier placement error. The subject of the modifier “a nearly frictionless state” is “superlubricity.” Subject-
modifier placement requires a modifier and its subject to be next to one another, so “superlubricity” must be the
first word in the missing clause.

Question ID

Conventions
ID: f868d438
In 2018, the innovative works of Congolese sculptor and architect Bodys Isek were featured in City Dreams, a solo exhibition at New
Kingelez;
Kingelez,
Kingelez
Kingelez:
ID: f868d438 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is punctuation between a subject and a verb. No
punctuation is needed when the subject of a sentence is immediately followed by a main verb. In this case, the
sentence’s subject (“the innovative works of Congolese sculptor and architect Bodys Isek Kingelez”) is followed by
the main verb “were featured,” and no punctuation should come between them.
because no punctuation is needed between the subject and the verb. Choice D is incorrect because no punctuation is
needed between the subject and the verb.

Question ID
Conventions
ID: 6d4b2e1e
The 1977 play And the Soul Shall Dance depicts two Japanese American farming families in Depression-era Southern California. Cri
playwright, Wakako Yamauchi,
playwright, Wakako Yamauchi
playwright Wakako Yamauchi,
playwright Wakako Yamauchi
ID: 6d4b2e1e Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is the use of punctuation between titles and proper nouns.
No punctuation is needed to set off the proper noun "Wakako Yamauchi" from the title that describes Yamauchi,
"pioneering playwright." Because "Wakako Yamauchi" is essential information identifying the "pioneering
playwright," no punctuation is necessary.
Choice A is incorrect because no punctuation is needed before or after the proper noun "Wakako Yamauchi."
Setting the playwright’s name off with commas suggests that it could be removed without affecting the coherence
of the sentence, which isn’t the case. Choice B is incorrect because no punctuation is needed between the title
"pioneering playwright" and the proper noun "Wakako Yamauchi." Choice C is incorrect because no punctuation is
needed between the proper noun "Wakako Yamauchi" and the verb "compares."

Question ID
ID: b85c19ed
The violins handmade in the seventeeth century by Italian craftsman Antonio Stradivari have been celebrated as some of the finest in
those
one
them
it
ID: b85c19ed Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is pronoun–antecedent agreement. The singular
pronoun “it” agrees in number with the singular antecedent “violin” and thus indicates that the traditional violin
(and not its curves) was made lighter.
Choice A is incorrect because the plural pronoun “those” doesn’t agree in number with the singular antecedent
“violin.” Choice B is incorrect because the singular pronoun “one” is ambiguous in this context; the resulting
sentence leaves unclear what Stradivari made lighter. Choice C is incorrect because the plural pronoun “them”
doesn’t agree in number with the singular antecedent “violin.”

Question ID
Conventions
ID: 109d5bbb
With some 16,000 in attendance, the Second World Black and African Festival of Arts and or FESTAC ‘77, as the event was more
Culture:
Culture—
Culture,
Culture
ID: 109d5bbb Answer

Correct Answer: B
Rationale
Choice B is the best answer. The text uses a dash to introduce a nonessential element that explains the acronym
FESTAC. The dash matches the dash that comes after “known,” ending the descriptive aside.
Choice A is incorrect. A colon can only come after an independent clause, which isn’t the case here. Choice C is
incorrect. While punctuation is required to set off “or FESTAC…known” from the rest of the sentence, nonessential
elements must be separated from the sentence with matching punctuation. Since a dash appears on the other side
of the element, we can’t use a comma here. Choice D is incorrect. The descriptive aside “or FESTAC…known” is a
nonessential element that must be separated with punctuation from the rest of the sentence. This choice fails to
add the necessary punctuation before the nonessential element.

Question ID

ID: 56770dda
In his 1963 exhibition Exposition of Music—Electronic Television, Korean American artist Nam June Paik showed how television ima
will be
had been
was
is
ID: 56770dda Answer

Correct Answer: D
Rationale
present tense verb “is,” used in conjunction with the word “today,” correctly indicates that Paik is currently
considered the first video artist.
Choice A is incorrect because the future-indicating verb “will be” doesn’t indicate that Paik is currently
considered the first video artist. Choice B is incorrect because the past perfect tense verb “had been” doesn’t
indicate that Paik is currently considered the first video artist. Choice C is incorrect because the past tense verb
“was” doesn’t indicate that Paik is currently considered the first video artist.

Question ID
ID: d073983d
Known for her massive photorealistic paintings of African American figures floating or swimming in pools, Calida Garcia
was the logical choice to design the book cover for Ta-Nehisi Coates’s The Water Dancer, a novel about an African American man wh
Rawles—
Rawles:
Rawles,
Rawles
ID: d073983d Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is punctuation between a subject and a verb. When, as
in this case, a subject (“Calida Garcia Rawles”) is immediately followed by a verb (“was”), no punctuation is
needed.
because no punctuation is needed between the subject and the verb. Choice C is incorrect because no punctuation is
needed between the subject and the verb.

Question ID
Conventions
ID: c468db1c
A group of ecologists led by Axel Mithöfer at the Max Planck Institute for Chemical Ecology in Germany examined the defensive r
plant.
plant;
plant
plant:
ID: c468db1c Answer

Correct Answer: D
Rationale
supplementary phrase. In this choice, a colon is correctly used to mark the boundary between the main clause (“A
group…plant”) and the supplementary element (“TN57…pests”) and to introduce the following elaboration on the
specific varieties of sweet potato plants that were examined.
Choice A is incorrect because it results in a rhetorically unacceptable sentence fragment beginning with
“TN57.” Choice B is incorrect because a semicolon can’t be used in this way to join the main clause (“A group…
plant”) and the supplementary element (“TN57…pests”). A semicolon is conventionally used to join two main
clauses, whereas a colon is conventionally used to introduce an element that explains or amplifies the information
in the preceding clause. Choice C is incorrect because it fails to mark the boundary between the main clause (“A
group...plant”) and the supplementary element (“TN57...pests”) with appropriate punctuation.

Question ID
ID: 8a9d2f4e
Researchers studying the “terra-cotta army,” the thousands of life-size statues of warriors found interred near the tomb of Emperor Q
are
is
were
have been
ID: 8a9d2f4e Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is subject–verb agreement. because the singular verb
“is” agrees in number with the singular subject “the shape.”
Choice A is incorrect because the plural verb “are” doesn’t agree in number with the singular subject “the shape.”
Choice C is incorrect because the plural verb “were” doesn’t agree in number with the singular subject “the shape.”
Choice D is incorrect because the plural verb “have been” doesn’t agree in number with the singular subject “the
shape.”

Question ID

ID: 576b2c70
A member of the Cherokee Nation, Mary Golda Ross is renowned for her contributions to NASA’s Planetary Flight Handbook, wh
provided
having provided
to provide
providing
ID: 576b2c70 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the use of finite verbs in a relative clause. Relative
clauses, such as the one beginning with “which,” require a finite verb, a verb that can function as the main verb of a
clause. This choice correctly supplies the clause with the finite past tense verb “provided.”
Choice B is incorrect because the non-finite participle “having provided” doesn’t supply the clause with a finite
verb. Choice C is incorrect because the non-finite to-infinitive “to provide” doesn’t supply the clause with a finite
verb.
Choice D is incorrect because the non-finite participle “providing” doesn’t supply the clause with a finite verb.

Question ID
ID: dfbf5d33
In 1453, English King Henry VI became unfit to rule after falling gravely ill. As a result, Parliament appointed Richard, Third Duke o
Henry resumed his reign,
the reign of Henry resumed,
Henry’s reign resumed,
it was Henry who resumed his reign,
ID: dfbf5d33 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is subject-modifier placement. This choice ensures that
the introductory phrase “upon recovering two years later” appears immediately before the noun it modifies
(“Henry”), clearly establishing that Henry recovered two years later.
Choice B is incorrect because it results in a dangling modifier. The placement of the noun phrase “the reign of
Henry” immediately after the introductory phrase illogically suggests that the reign of Henry recovered two years
later. Choice C is incorrect because it results in a dangling modifier. The placement of the noun phrase “Henry’s
reign” immediately after the introductory phrase illogically suggests that Henry’s reign recovered two years
later. Choice D is incorrect because it results in a dangling modifier. The placement of the function word “it”
immediately after the introductory phrase illogically suggests that “it” recovered two years later.

Question ID

Conventions
ID: f2eaaf5d
At eight paragraphs long, the preamble to the constitution of country in Western Asia—is much longer than the one- paragraph prea
Bahrain—a
Bahrain, a
Bahrain a
Bahrain: a
ID: f2eaaf5d Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the punctuation of a supplementary element within a
sentence. The dash after “Bahrain” pairs with the dash after “Asia” to separate the supplementary element “a
country in Western Asia” from the rest of the sentence.
Choice B is incorrect because a comma can’t be paired with a dash in this way to separate the supplementary
element from the rest of the sentence. Choice C is incorrect because it fails to use appropriate punctuation to
separate the supplementary element from the rest of the sentence. Choice D is incorrect because a colon can’t be
paired with a dash in this way to separate the supplementary element from the rest of the sentence.

Question ID

ID: ec08463d
Botanists recognize over fifty different species of sunflower. One species, the silverleaf sunflower, both an early- flowering ecotype
having included
including
to include
includes
ID: ec08463d Answer

Correct Answer: D
Rationale
Choice D is the best answer. This verb needs to function as the main verb in the sentence, with the subject “one
species,” so it needs to be conjugated. This choice gives us the singular present tense “includes,” which is the only
conjugated form of the verb among the choices.
Choice A is incorrect. This doesn’t complete the text in a way that conforms to the conventions of Standard English.
This verb needs to function as the main verb in the sentence, with the subject “one species,” so it needs to be
conjugated. “Having included” is a participle form of the verb: it’s not conjugated and doesn’t function like a normal
verb. Choice B is incorrect. This doesn’t complete the text in a way that conforms to the conventions of Standard
English. This verb needs to function as the main verb in the sentence, with the subject “one species,” so it needs to
be conjugated. “Including” is the gerund form of the verb: it’s not conjugated and doesn’t function like a normal
verb. Choice C is incorrect. This doesn’t complete the text in a way that conforms to the conventions of Standard
English. This verb needs to function as the main verb in the sentence, with the subject “one species,” so it needs to
be conjugated. “To include” is the infinitive form of the verb: it’s not conjugated.

Question ID

ID: 4a90a978
In 1990, California native and researcher Ellen Ochoa left her position as chief of the Intelligent Systems Technology Branch a NASA
at
to join
is joining
joined
joins
ID: 4a90a978 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the use of nonfinite verb forms in a sentence. The
nonfinite to-infinitive verb "to join" is correctly used to form a subordinate clause that expresses why Ochoa left her
position (to join the training program).
Choice B is incorrect because the finite verb "is joining" can’t be used in this way to indicate Ochoa’s action of
joining the training program. A conjunction such as "and" would be needed to coordinate "is joining" with the
previous finite verb, "left." Choice C is incorrect because the finite verb "joined" can’t be used in this way to
indicate Ochoa’s action of joining the training program. A conjunction such as "and" would be needed to
coordinate "joined" with the previous finite verb, "left." Choice D is incorrect because the finite verb "joins" can’t
be used in this way to indicate Ochoa’s action of joining the training program. A conjunction such as "and" would
be needed to coordinate "joins" with the previous finite verb, "left."

Question ID
ID: 59e41600
Why are Rome’s famous concrete structures, such as the Colosseum, still standing after 2,000-plus years, when modern concrete may
explain
having explained
explaining
to explain
ID: 59e41600 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is the use of verb forms within a sentence. The main
clause of a sentence requires a finite (tensed) verb, and this choice supplies the finite present tense verb “explain”
to indicate what the scientists do.
Choice B is incorrect because it results in an ungrammatical sentence. The nonfinite participle “having explained”
doesn’t supply the main clause with a finite verb. Choice C is incorrect because it results in an ungrammatical
sentence. The nonfinite participle “explaining” doesn’t supply the main clause with a finite verb. Choice D is
incorrect because it results in an ungrammatical sentence. The nonfinite to-infinitive “to explain” doesn’t supply
the main clause with a finite verb.

Question ID
Conventions
ID: d75d57a0
While many video game creators strive to make their graphics ever more others look to the past, developing titles with visuals inspire
lifelike but
lifelike
lifelike,
lifelike, but
ID: d75d57a0 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is punctuation between a subordinate clause and a main
clause. This choice correctly uses a comma to mark the boundary between the subordinate clause (“While…
lifelike”) and the main clause (“others look to the past”).
Choice A is incorrect because it results in an incomplete sentence with no main clause. Choice B is incorrect
because it fails to mark the boundary between the subordinate clause (“While…lifelike”) and the main clause
(“others…past”). Choice D is incorrect because it results in an incomplete sentence with no main clause.

Question ID
Conventions
ID: a427a52c
The Lion Light system, developed by Kenyan inventor Richard Turere, consists of LED lights installed around the perimeter of livest
energy collected, by solar panels, during the day
energy collected by solar panels during the day
energy collected by solar panels during the day,
energy, collected by solar panels during the day,
ID: a427a52c Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is punctuation between a supplementary phrase and a
main clause. This choice correctly uses a comma to mark the boundary between the supplementary phrase
(“powered…day”), which describes how the LEDs are powered, and the main clause (“the blinking…night”).
Choice A is incorrect because it fails to mark the boundary between the supplementary phrase and the main clause
with appropriate punctuation. Furthermore, placing commas around the phrase “by solar panels” suggests that it
could be removed without affecting the coherence of the sentence, which isn’t the case. Choice B is incorrect
because it fails to mark the boundary between the supplementary phrase and the main clause with appropriate
punctuation. Choice D is incorrect. Placing commas around the phrase “collected by solar panels during the day″
suggests that it could be removed without affecting the coherence of the sentence, which isn’t the case.

Question ID
ID: 3daf126e
A model created by biologist Luis Valente predicts that the rate of speciation—the rate at which new species form—on an isolated isla
being
to be
to have been
will be
ID: 3daf126e Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is finite and nonfinite verb forms within a sentence.
Relative clauses, such as the one beginning with “that,” require a finite verb, a verb that can function as the main
verb of a clause. This choice correctly supplies the clause with the finite future tense verb “will be.”
Choice A is incorrect because the nonfinite participle “being” doesn’t supply the clause with a finite verb. Choice B is
incorrect because the nonfinite to-infinitive “to be” doesn’t supply the clause with a finite verb. Choice C is incorrect
because the nonfinite to-infinitive “to have been” doesn’t supply the clause with a finite verb.

Question ID
ID: 975eda7c
For thousands of years, people in the Americas the bottle gourd, a large bitter fruit with a thick rind, to make bottles,
other types of containers, and even musical instruments. Oddly, there is no evidence that any type of bottle gourd is native
to the Western Hemisphere; either the fruit or its seeds must have somehow been carried from Asia or Africa.
to use
have used
having used
using
ID: 975eda7c Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is finite and nonfinite verb forms within a sentence. A
main clause requires a finite verb to perform the action of the subject (in this case, “people in the Americas”),
and this choice supplies the finite past perfect tense verb “have used” to indicate what people in the Americas
used the gourd for.
Choice A is incorrect because the nonfinite to-infinitive “to use” doesn’t supply the main clause with a finite verb.
Choice C is incorrect because the nonfinite participle “having used” doesn’t supply the main clause with a finite
verb. Choice D is incorrect because the nonfinite participle “using” doesn’t supply the main clause with a finite verb.

Question ID
Conventions
ID: c04e9136
The 2022 Nobel Prize in Chemistry was awarded to three pioneers in the field of click chemistry: two-time Nobel laureate Barry Shar
Stanford
Stanford,
Stanford:
Stanford;
ID: c04e9136 Answer

Correct Answer: D
Rationale
Choice D is the best answer. This choice correctly uses a semicolon to punctuate a complex list (which is made up
of items that have commas in them).
Choice A is incorrect. This is a complex list, indicated by the semicolon between "1998" and "Carolyn Bertozzi."
What comes after the blank is a separate list item, so punctuation is needed after "Stanford." Choice B is incorrect.
This is a complex list, indicated by the semicolon between "1998" and "Carolyn Bertozzi." The items in this list
have internal punctuation in the form of commas and must therefore be separated by semicolons to avoid
confusion. Choice C is incorrect. This is a complex list, indicated by the semicolon between "1998" and "Carolyn
Bertozzi." Colons aren’t used to separate items in a list.

Question ID 588887b9

ID: 588887b9
In 1881, French chemist Camille Faure redesigned the rechargeable lead-acid battery. Faure’s design greatly increased the amount o
is inventing
will invent
invents
had invented
ID: 588887b9 Answer

Correct Answer: D
Rationale
Choice D is the best answer. Faure redesigned the battery in 1881, and the original battery was invented “fifteen
years earlier.” Notice that this is the only choice in the past tense. To indicate that a past occurrence took place
before another past occurrence, we need to use “had” + the past tense form of the verb. This is called the “past
perfect” tense.
Choice A is incorrect. This choice creates a tense error. Planté invented the original battery in the past, so we
shouldn’t use the present tense “is inventing.” Choice B is incorrect. This choice creates a tense error. Planté
invented the original battery in the past, so we shouldn’t use the future tense “will invent.” Choice C is
incorrect. This choice creates a tense error. Planté invented the original battery in the past, so we shouldn’t use
the present tense “invents.”

Question ID
Conventions
ID: fe41f258
In ancient Greece, an Epicurean was a follower of Epicurus, a philosopher whose beliefs revolved around the pursuit of pleasure. Epicu
soul,” positing
soul”: positing
soul”; positing
soul.” Positing
ID: fe41f258 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is punctuation use between a main clause and a
participial phrase. This choice correctly uses a comma to mark the boundary between the main clause
(“Epicurus…‘soul’”) and the participial phrase (“positing…absence”) that provides additional information about how
Epicurus defined pleasure.

Choice B is incorrect because a colon can’t be used in this way to join a main clause and a participial phrase.
Choice C is incorrect because a semicolon can’t be used in this way to join a main clause and a participial phrase.
Choice D is incorrect because it results in a rhetorically unacceptable sentence fragment beginning with
“positing.”

Question ID
Conventions
ID: 9902d2de
The Alvarez theory, developed in 1980 by physicist Luis Walter Alvarez and his geologist son Walter Alvarez, maintained that the se
out but
out, but
out
out,
ID: 9902d2de Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the coordination of main clauses within a sentence.
This choice correctly uses a comma and the coordinating conjunction “but” to join the first main clause (“the
Alvarez…out”) and the second main clause (“it left…extinctions”).
Choice A is incorrect because when coordinating two longer main clauses such as these, it’s conventional to use
a comma before the coordinating conjunction. Choice C is incorrect because it results in a run-on sentence. The
two main clauses are fused without punctuation and/or a conjunction. Choice D is incorrect because it results in a

Question ID

ID: cd2443c0
A pioneer in the field of taphonomy (the study of how organic remains become fossils), may be just as prevalent in the fossil record a
fossils of thin-shelled organisms, Anna Behrensmeyer demonstrated in a 2005 analysis,
Anna Behrensmeyer demonstrated in a 2005 analysis that fossils of thin-shelled organisms
it was demonstrated in a 2005 analysis by Anna Behrensmeyer that fossils of thin-shelled organisms
a 2005 analysis—by Anna Behrensmeyer—demonstrated that fossils of thin-shelled organisms
ID: cd2443c0 Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is subject-modifier placement. This choice makes the
noun phrase “Anna Behrensmeyer” the subject of the sentence and places it immediately after the modifying
phrase “a pioneer…fossils.” In doing so, this choice clearly establishes that Anna Behrensmeyer—and not another
noun in the sentence—is a pioneer in the field of taphonomy.
Choice A is incorrect because it results in a dangling modifier. The placement of the noun phrase “fossils of thin-
shelled organisms” immediately after the modifying phrase illogically suggests that the “fossils” are a pioneer in
the field of taphonomy. Choice C is incorrect because it results in a dangling modifier. The placement of the
pronoun “it” immediately after the modifying phrase illogically suggests that “it” is a pioneer in the field of
taphonomy. Choice D is incorrect because it results in a dangling modifier. The placement of the noun phrase “a
2005 analysis” immediately after the modifying phrase illogically suggests that “a 2005 analysis” is a pioneer in
the field of taphonomy.

Question ID

ID: e44db0a0
Because a cycle of lunar phases 29.5 days to complete, it’s possible to observe two full moons in a single month, one at the beginni
are taking
have taken
take
takes
ID: e44db0a0 Answer

Correct Answer: D
Rationale
Choice D is the best answer. The convention being tested is subject-verb agreement. The singular verb
"takes" agrees in number with the singular subject "a cycle of lunar phases."
Choice A is incorrect because the plural verb "are taking" doesn’t agree in number with the singular subject "a
cycle of lunar phases." Choice B is incorrect because the plural verb "have taken" doesn’t agree in number with
the singular subject "a cycle of lunar phases." Choice C is incorrect because the plural verb "take" doesn’t agree
in number with the singular subject "a cycle of lunar phases."

Question ID
ID: 96e5da01
The alga species Chlorella vulgaris is very efficient at making oxygen. For this reason, scientists are currently exploring ways to use
are producing
produced
produce
have produced
ID: 96e5da01 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the use of verbs to express tense. Simple present
tense verbs can be used to describe actions that tend to occur, including in a hypothetical or future scenario. In
this case, the simple present tense verb “produce” indicates what the air exchange systems might be able to do
in the future
(produce oxygen for astronauts).

Choice A is incorrect. The present progressive tense verb “are producing” suggests that the oxygen is currently
being produced, not that it might be produced in the future. Choice B is incorrect because the past tense verb
“produced” suggests that the oxygen was produced in the past, not that it might be produced in the future.
Choice D is incorrect because the present perfect tense verb “have produced” suggests that the oxygen has been
produced from a point in the past up to the present, not that it might be produced in the future.

Question ID

Conventions
ID: 2c4cd76d
Researchers studying magnetosensation have determined why some soil-dwelling roundworms in the Southern Hemisphere move
food:
food,
C. food while
D. food
ID: 2c4cd76d Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is colon use within a sentence. A colon used in this way
introduces information that illustrates or explains information that has come before it. In this case, the colon
introduces the following explanation of why some roundworms in the Southern Hemisphere move in the opposite
direction of Earth’s magnetic field.
Choice B is incorrect because it results in a comma splice. A comma can’t be used in this way to join two long
independent clauses (“Researchers…food” and “in…sources”) such as these. Choice C is incorrect because it results
in a run-on sentence. The two clauses (“Researchers…food” and “in…sources”) are fused without punctuation.
Furthermore, the conjunction “while” fails to indicate that what follows is an explanation of why some
roundworms in the Southern Hemisphere move in the opposite direction of Earth’s magnetic field. Choice D is
incorrect
because it results in a run-on sentence. The two clauses (“Researchers…food” and “in…sources”) are fused without
punctuation and/or a conjunction.
Question ID
ID: 12bd5b75
With its towering, six-spired exterior of granitelike quartz monzonite, the Salt Lake Temple is one of the most instantly recognizable s
it was
one was
they were
both were
ID: 12bd5b75 Answer

Correct Answer: A
Rationale
Choice A is the best answer. The convention being tested is pronoun-antecedent agreement. The singular pronoun
"it" agrees in number with the singular antecedent "the Salt Lake Temple."
Choice B is incorrect because the singular pronoun "one" is ambiguous in this context; the resulting sentence
leaves unclear whether there is only one Salt Lake temple or multiple. Choice C is incorrect because the plural
pronoun "they" doesn’t agree in number with the singular antecedent "the Salt Lake Temple." Choice D is
incorrect because the plural pronoun "both" doesn’t agree in number with the singular antecedent "the Salt Lake
Temple."

Question ID

Conventions
ID: 3ed5ebb4
In her analysis of Edith Wharton’s The House of Mirth (1905), scholar Candace Waid observes that the novel depicts the upper class
materialism”; and
materialism” and
C. materialism,”
D. materialism”
ID: 3ed5ebb4 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is punctuation between a main clause and a
supplementary noun phrase. This choice correctly uses a comma to mark the boundary between the main clause
(“scholar…materialism”) and the supplementary noun phrase (“an apt assessment”) that describes Waid’s
observation about how The House of Mirth depicts the upper classes of New York society.
Choice A is incorrect because a semicolon and the conjunction “and” can’t be used in this way to mark the
boundary between a main clause and a supplementary noun phrase. Choice B is incorrect. Joining the main clause
(“scholar… materialism”) and the following noun phrase with the conjunction “and” results in a confusing and
illogical sentence that suggests that the novel depicts the upper classes of New York society as “an apt
assessment,” which doesn’t make sense in this context. Choice D is incorrect because it fails to mark the
boundary between the main clause and the supplementary noun phrase with appropriate punctuation.

ID: 67614549
After winning the 1860 presidential election, Abraham Lincoln appointed Edward Bates, Salmon P. Chase, and William H. Seward to h
has leveraged
is leveraging
will leverage
leveraged
ID: 67614549 Answer

Correct Answer: D
Rationale
Choice D is the best answer. The subject of the verb is “Lincoln,” and the first sentence tells us that we’re talking
about something that Abraham Lincoln did in 1860. So the simple past tense “leveraged” fits the logic of the text.
Choice A is incorrect. This choice creates a tense issue. “Has leveraged” is the present perfect tense, which is used
for an action that began in the past and continues into the present. Lincoln started leveraging his rivals’ talents in
1860—it’s definitely not still happening today. So the present perfect tense isn’t appropriate. Choice B is incorrect.
This choice creates a tense issue. “Is leveraging” is the present tense, but Lincoln leveraged his rivals’ talents in
1860, so the present tense isn’t appropriate. Choice C is incorrect. This choice creates a tense issue. “Will leverage” is
the future tense, but Lincoln leveraged his rivals’ talents in 1860, so the future tense isn’t appropriate.

Question ID
Conventions
ID: 78b88c04
Joshua Hinson, director of the language revitalization program of the Chickasaw Nation in Oklahoma, helped produce the world’s
Basic; in 2009, an online television network;
Basic; in 2009, an online television network,
Basic, in 2009; an online television network,
Basic, in 2009, an online television network,
ID: 78b88c04 Answer

Correct Answer: C
Rationale
Choice C is the best answer. The convention being tested is the punctuation of items in a complex series. It’s
conventional to use a semicolon to separate items in a complex series with internal punctuation, and in this choice,
the semicolon after “2009” is conventionally used to separate the first item (“the world’s…2009”) and the second item
(“an online…2010”) in the series of things that Hinson helped create. Further, the comma after “Basic” correctly pairs
with the comma after “app,” and the comma after “network” correctly pairs with the comma after “TV” to set off the
supplemental elements (“Chickasaw Basic” and “Chickasaw TV”) that provide the names of the app and the TV
network, respectively. Altogether, the punctuation in this choice results in a sentence that clearly indicates that
Hinson helped make a language app in 2009, an online TV network in 2010, and a language course in 2015.
Choice A is incorrect because it fails to punctuate the complex series in a way that makes clear that Hinson helped
make a language app in 2009, an online TV network in 2010, and a language course in 2015. Choice B is incorrect
because it fails to punctuate the complex series in a way that makes clear that Hinson helped make a language app
in 2009, an online TV network in 2010, and a language course in 2015. Choice D is incorrect because the comma
after “2009” doesn’t match the semicolon used to separate the second and third items in the complex series.
Question ID bd11fe93

ID: bd11fe93
Dr. Rocío Paola Caballero-Gill is a paleoceanographer. This means that Dr. Caballero-Gill doesn’t just study oceans as they are today
has studied
to study
studied
D. studies
ID: bd11fe93 Answer

Correct Answer: B
Rationale
Choice B is the best answer. The convention being tested is the use of verb forms within a sentence. The nonfinite
to-infinitive verb “to study” is correctly used to form a subordinate clause that indicates what Dr. Caballero-Gill
uses chemistry and fossil evidence for (to study oceans as they were in the past).
Choice A is incorrect because it results in an ungrammatical sentence. The finite verb “has studied” can’t be used
in this way to form a subordinate clause that indicates what Dr. Caballero-Gill uses the evidence for. Choice C is
incorrect because it results in an ungrammatical sentence. The finite verb “studied” can’t be used in this way to
form a subordinate clause that indicates what Dr. Caballero-Gill uses the evidence for. Choice D is incorrect
because it results in an ungrammatical sentence. The finite verb “studies” can’t be used in this way to form a
subordinate clause that indicates what Dr. Caballero-Gill uses the evidence for.

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Question ID de55ec71

Assessment Test Domain Skill Diﬃculty

SAT Reading and Writing Standard English Boundaries

ID: de55ec71 Answer

needed between the subject and the

SAT Reading and Writing Standard English Form, Structure,

ID: e38b3e4f Answer

Question Difficulty: Easy

SAT Reading and Writing Standard English Boundaries

ID: 89fbc3eb Answer

before the coordinating

Question Difficulty: Medium

SAT Reading and Writing Standard English Boundaries

Entomologist, Heather Grab,

Entomologist Heather Grab

Entomologist Heather Grab,

ID: 960dec02 Answer

Question Difficulty: Hard

SAT Reading and Writing Standard English Form, Structure,

two problems are associated with commercial plastics:

commercial plastics’ two associated problems are that

commercial plastics have two associated problems:

ID: 37e5c794 Answer

Question Difficulty: Hard

SAT Reading and Writing Standard English Form, Structure,

a sit-in protest staged by the activists increased pressure on lawmakers

the activists increased pressure on lawmakers by staging a sit-in protest

ID: 6f08641e Answer

Question Difficulty: Medium

SAT Reading and Writing Standard English Form, Structure,

would have measured

will have been measuring

ID: 3580533b Answer

Question Difficulty: Easy

SAT Reading and Writing Standard English Boundaries

ID: 74ce2f05 Answer

Question Difficulty: Medium

SAT Reading and Writing Standard English Boundaries

ID: adf210e7 Answer

Question Difficulty: Hard

SAT Reading and Writing Standard English Form, Structure,

ID: b7363ba2 Answer

Question Difficulty: Easy

SAT Reading and Writing Standard English Form, Structure,

has been studying

ID: 1ee7b429 Answer

Question Difficulty: Medium

SAT Reading and Writing Standard English Boundaries

ID: 333b2b65 Answer

Question Difficulty: Easy

SAT Reading and Writing Standard English Boundaries

practice at the time;

practice, at the time,

practice at the time,

ID: aaa1907f Answer

Question Difficulty: Hard

SAT Reading and Writing Standard English Boundaries

ID: 7f48b098 Answer

Question Difficulty: Medium