It _______ the responsibility of all employees to report safety hazards.
1
readingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
are
B
were
C
have been
D
is
Correct Answer: D
Choice D is the best answer. This question tests subject-verb agreement with expletive "it."
- Context clues: "It" is a placeholder; the true subject follows the verb.
- Meaning: When "it" is the grammatical subject, the verb agrees with "it" (singular).
- Verify: "It is the responsibility" correctly uses singular verb.
💡 Strategy: Expletive "it" always takes a singular verb.
Choice A is incorrect because "are" is plural. Choice B is incorrect because "were" is plural. Choice C is incorrect because "have been" is plural.