Question 1

Having spent months synthesizing the delicate palladium-based catalyst in a vacuum chamber, __________ that the resulting chemical yield was significantly higher than previously recorded.

(A) the research team’s hypothesis was confirmed

(B) the confirmation of the hypothesis proved

(C) the research team confirmed

(D) a significant increase in the chemical yield proved

Question 2

The initial field reports from the vulcanological expedition in Iceland, which cataloged more than forty distinct tectonic anomalies over a two-week period, __________ that magma movement is accelerating beneath the peninsula.

(A) indicates

(B) indicate

(C) is indicating

(D) has indicated

Question 3

The principal architectural feature of the ancient monument, which utilized massive interlocking limestone blocks without mortar to survive frequent earthquakes, __________ an engineering marvel to modern historians.

(A) remain

(B) remains

(C) remaining

(D) are remaining

Question 4

Dr. Patel's environmental study focused heavily on the unique migratory behavior of the Danaus plexippus __________ a specialized species of butterfly known for traveling thousands of miles each winter.

(A) butterfly—

(B) butterfly;

(C) butterfly, which it is

(D) butterfly:

Question 5

Deep-sea core samples extracted from the Mariana Trench indicate that microbial life thrives in extreme environments __________ these extremophiles rely on chemosynthesis rather than solar energy to generate metabolic sustenance.

(A) environments; because

(B) environments. Because

(C) environments,

(D) environments;

Question 6

While analyzing the linguistic patterns of the ancient text, the research team discovered that several recurring idioms __________ to a highly structured socio-political hierarchy.

(A) points

(B) is pointing

(C) point

(D) has pointed

Question 7

By utilizing a network of synchronized atomic clocks to measure fractional delays in radio frequencies, _________ to map the subtle distortions caused by gravitational waves.

(A) the astrophysicists' algorithm was successfully able

(B) the successful mapping of distortions allowed astrophysicists

(C) the astrophysicists were successfully able

(D) successfully mapping distortions allowed the astrophysicists

Question 8

The primary economic benefit of the newly proposed transit infrastructure, which aims to reduce daily commuting times across the metropolitan area by nearly thirty percent, __________ primarily to small businesses.

(A) accrue

(B) accrues

(C) accruing

(D) are accruing

Question 9

The newly developed solar arrays are covered in a microscopic, self-cleaning film __________ an innovative silicon-based coating that repels dust, moisture, and organic debris without reducing energy efficiency.

(A) film—

(B) film;

(C) film, which it is

(D) film.

Question 10

The marine biology team documented a dramatic shift in the local ecosystem __________ the sudden influx of apex predators completely altered the foraging habits of smaller reef fish.

(A) ecosystem. Because

(B) ecosystem; because

(C) ecosystem;

(D) ecosystem,

Question 11

Though initially engineered to serve as a lightweight insulation material for deep-space satellites, __________ quickly found a home in commercial building construction due to its thermal efficiency.

(A) architects successfully adapted the synthetic aerogel

(B) the adaptation of the synthetic aerogel allowed it to be

(C) the synthetic aerogel was successfully adapted by architects

(D) successfully adapting the synthetic aerogel allowed architects to use it

Question 12

The diverse data sets compiled by the agricultural drone network, which monitored over ten thousand acres of arable cropland during the peak growing season, __________ that targeted irrigation reduces water waste by forty percent.

(A) demonstrates

(B) is demonstrating

(C) demonstrate

(D) has demonstrated

Answer Key & Strategy Review

Question 1

Answer: (C)

Strategy: Cross-Out Modifier Trick

The phrase before the comma describes something that physically spent months synthesizing a catalyst. Only the research team can perform that action.

Question 2

Answer: (B)

Strategy: 3 vs. 1 Rule (Odd One Out)

• indicates → singular
• indicate → plural
• is indicating → singular
• has indicated → singular

Only one plural option exists.

Question 3

Answer: (B)

Strategy: Drop the Fat

Cross out:

which utilized massive interlocking limestone blocks without mortar to survive frequent earthquakes

Core sentence:

The principal architectural feature __________ an engineering marvel.

Feature = singular.

Question 4

Answer: (D)

Strategy: Dashes = Colons

The second half directly defines and explains the butterfly species.

Question 5

Answer: (D)

Strategy: Semicolon = Period

Both sides are complete sentences.

A standalone semicolon correctly joins them.

Question 6

Answer: (C)

Strategy: 3 vs. 1 Rule (Odd One Out)

• points → singular
• is pointing → singular
• point → plural
• has pointed → singular

Only one plural choice.

Question 7

Answer: (C)

Strategy: Cross-Out Modifier Trick

Who is utilizing atomic clocks?

Only astrophysicists can perform that action.

Question 8

Answer: (B)

Strategy: Drop the Fat

Cross out:

which aims to reduce daily commuting times across the metropolitan area by nearly thirty percent

Core sentence:

The primary economic benefit __________ primarily to small businesses.

Benefit = singular.

Question 9

Answer: (A)

Strategy: Dashes = Colons

The second half defines what the film is.

Since a colon is not available, the em dash performs the same job.

Question 10

Answer: (C)

Strategy: Semicolon = Period

Left side = complete sentence.

Right side = complete sentence.

Use a standalone semicolon.

Question 11

Answer: (C)

Strategy: Cross-Out Modifier Trick

What was engineered to serve as insulation material?

The synthetic aerogel.

Not architects.

Not adaptation.

Question 12

Answer: (C)

Strategy: 3 vs. 1 Rule (Odd One Out)

• demonstrates → singular
• is demonstrating → singular
• demonstrate → plural
• has demonstrated → singular

Only one plural choice.

Strategy Breakdown