_______ new theory challenged decades of scientific consensus.
3
readingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
Dr. Williams's
B
Dr. Williams'
C
Dr. Williams
D
Dr. Williamss'
Correct Answer: A
Choice A is the best answer. This question tests apostrophe usage with singular nouns ending in "s."
- Context clues: One person (Dr. Williams) possesses the theory.
- Meaning: For singular proper nouns ending in "s," add 's (modern standard).
- Verify: "Dr. Williams's new theory" follows the standard rule for singular possessives.
💡 Strategy: Singular nouns ending in "s" take 's for possession (Williams's).
Choice B is incorrect because "Williams'" is acceptable but "Williams's" is preferred. Choice C is incorrect because it lacks a possessive marker. Choice D is incorrect because "Williamss'" is not standard English.