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He ________ have been nervous because he didn't go straight in. A. ought to B. must C. should D

更新时间:2026-06-13 12:40:26   栏目: 中华词典

He ________ have been nervous because he didn't go straight in. A. ought to B. must C. should D. had to

The correct answer is:

B. must

The sentence would be:
"He must have been nervous because he didn't go straight in."

This is because "must" is often used to express a strong assumption or deduction about the past, suggesting that it is very likely that he was nervous.