If the experiment _______ successful, we would have published the results immediately.
9
readingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
was
B
is
C
had been
D
would be
Correct Answer: C
Choice C is the best answer. This question tests verb form in past unreal conditionals.
- Context clues: "Would have published" in the result clause indicates past unreal.
- Meaning: Past unreal conditionals use "had + past participle" in the "if" clause.
- Verify: "If the experiment had been successful, we would have published" is correct.
💡 Strategy: Past unreal conditionals: if + had + past participle, would have + past participle.
Choice A is incorrect because "was" doesn't match past unreal conditional. Choice B is incorrect because "is" is present tense. Choice D is incorrect because "would be" doesn't go in the "if" clause.