1.Former marine biologist Dr. Carlos Rivera notes that while he cannot predict the exact timeline, he _______ that ocean ecosystems will face unprecedented changes due to climate shifts. This belief shapes his approach to long-term conservation strategies.

Which choice completes the text with the most logical and precise word or phrase?
A) confirms
B) predicts
C) speculates
D) rejects

2. Beginning in the early 1960s, environmental activist Rachel Carson tirelessly worked to raise awareness about the dangers of pesticide use; this _______ campaign included extensive research, public lectures, and the publication of Silent Spring.

Which choice completes the text with the most logical and precise word or phrase?
A) casual
B) persistent
C) reluctant
D) accidental

3. Throughout her career, astronomer Vera Rubin carefully gathered data to support her findings; this _______ research ultimately changed scientists’ understanding of dark matter.

Which choice completes the text with the most logical and precise word or phrase?
A) careless
B) persistent
C) incidental
D) reluctant

4. Over several decades, civil rights leader Bayard Rustin remained committed to nonviolent activism; this _______ dedication helped shape major social movements in the United States.

Which choice completes the text with the most logical and precise word or phrase?
A) fleeting
B) mandatory
C) persistent
D) arbitrary

5. Beginning early in his career, composer Ludwig van Beethoven repeatedly revised his works; this _______ attention to detail contributed to the lasting influence of his music.

Which choice completes the text with the most logical and precise word or phrase?
A) offhand
B) persistent
C) accidental
D) indifferent

6. For years, journalist Nellie Bly investigated unsafe conditions in institutions; this _______ reporting led to widespread public awareness and reform.

Which choice completes the text with the most logical and precise word or phrase?
A) impartial
B) persistent
C) hesitant
D) superficial

7. Across many expeditions, botanist George Washington Carver carefully studied soil health; this _______ effort improved agricultural practices for countless farmers.

Which choice completes the text with the most logical and precise word or phrase?
A) temporary
B) persistent
C) sporadic
D) reluctant

8. As one of the earliest women to earn a medical degree in the United States, Elizabeth Blackwell became a ______ figure in American history: her achievements paved the way for future generations of female physicians.

Which choice completes the text with the most logical and precise word or phrase?
A) minor
B) controversial
C) significant
D) obscure

9. Because of its complex narrative structure, shifting perspectives, and unresolved themes, William Faulkner’s novel The Sound and the Fury can be challenging to ______, leading to a wide range of critical interpretations.

Which choice completes the text with the most logical and precise word or phrase?
A) summarize
B) interpret
C) imitate
D) dismiss

10. As the lead engineer on the project, Kalpana Chawla became a ______ figure in the history of space exploration, inspiring countless students to pursue careers in science and engineering.

Which choice completes the text with the most logical and precise word or phrase?
A) trivial
B) influential
C) anonymous
D) accidental

11. Because the philosopher’s writing relies heavily on abstract concepts and specialized terminology, his essays can be difficult to ______ without careful study.

Which choice completes the text with the most logical and precise word or phrase?
A) interpret
B) manufacture
C) abandon
D) advertise

12. Through years of careful experimentation and observation, Marie Curie became a ______ figure in modern science, earning two Nobel Prizes for her groundbreaking work.

Which choice completes the text with the most logical and precise word or phrase?
A) insignificant
B) controversial
C) prominent
D) obscure

13. The Industrial Revolution brought about a ______ transformation in society, as new technologies and factories rapidly changed the ways people worked and lived.

Which choice completes the text with the most logical and precise word or phrase?
A) gradual
B) sudden
C) negligible
D) optional

14. Recent studies of ancient Mesopotamian cities suggest that women may have participated in trade and administration, which could lead historians to ______ earlier assumptions that only men controlled economic activities.

Which choice completes the text with the most logical and precise word or phrase?
A) abandon
B) concede
C) ignore
D) dictate

15. Some species of desert plants produce seeds that remain dormant until rare rainfall events occur. The seeds’ dormancy is not ______; rather, it is an adaptive mechanism that ensures survival in harsh conditions.

Which choice completes the text with the most logical and precise word or phrase?
A) purposeless
B) spontaneous
C) ineffective
D) temporary

16. During the Renaissance, Leonardo da Vinci made contributions to art, engineering, and anatomy that were far ahead of his time. His work demonstrates a level of ______ insight, allowing him to connect ideas across seemingly unrelated fields.

Which choice completes the text with the most logical and precise word or phrase?
A) superficial
B) profound
C) ordinary
D) irrelevant

17. For wildlife photographer Jane Goodall, being _______ was essential to capturing authentic animal behavior. She carefully observed chimpanzees in their natural habitat to document their social interactions.

Which choice completes the text with the most logical and precise word or phrase?
A) observant
B) careless
C) skeptical
D) indifferent

18. During the 20th century, radio became a powerful tool because it was both a source of entertainment and a ______ of news. Families across the country relied on it to learn about events happening near and far.

Which choice completes the text with the most logical and precise word or phrase?
A) distributor
B) source
C) rival
D) challenge

19. Some species of cicadas emerge from the ground every 13 or 17 years, carefully timing their life cycle to avoid predators and maximize survival. This precise _______ of emergence allows them to appear in huge numbers simultaneously, overwhelming potential threats.

Which choice completes the text with the most logical and precise word or phrase?
A) synchronization
B) hibernation
C) speculation
D) moderation

20. During a solar eclipse, scientists often set up instruments to observe the sun’s corona. Careful _______ of the timing and location of the eclipse ensures that researchers collect accurate and useful data.

Which choice completes the text with the most logical and precise word or phrase?
A) synchronization
B) calculation
C) hesitation
D) exaggeration

21. Despite their shared history and culture, the two political factions could not reconcile their differences, and a long-standing ______ developed between their leaders.

Which choice completes the text with the most logical and precise word or phrase?
A) friendship
B) animosity
C) alliance
D) cooperation

22. The rare flowers are ______ to this mountainous region, meaning they cannot naturally be found anywhere else in the world.

Which choice completes the text with the most logical and precise word or phrase?
A) indigenous
B) invasive
C) foreign
D) artificial

23. After years of careful saving and wise investments, the entrepreneur became quite ______, living in a mansion and driving luxury cars.

Which choice completes the text with the most logical and precise word or phrase?
A) insolvent
B) affluent
C) impoverished
D) destitute

24. Social media allows users to experience exciting events ______, as if they were personally participating in someone else’s life.

Which choice completes the text with the most logical and precise word or phrase?
A) vicariously
B) directly
C) reluctantly
D) superficially

25. The flea market offered a ______ of items, from antique furniture to handmade jewelry and secondhand books, making it both chaotic and charming.

A) hodgepodge
B) uniformity
C) sequence
D) collection

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SAT Grammar