------I don’t know why he has made such a silly mistake in t
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------I don’t know why he has made such a silly mistake in the exam. ------ He ____________ it before he handed in the paper.
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D
考查情态动词+have done的用法:A. may have checked可能已经检查了,B. might check 可能检查了, C. must have checked一定检查了,D. should have checked 本该检查而没有,句意是:--我不知道为什么他在考试中犯了这么愚蠢的错。--他本该交试卷钱检查一下的。选D。
考查情态动词+have done的用法:A. may have checked可能已经检查了,B. might check 可能检查了, C. must have checked一定检查了,D. should have checked 本该检查而没有,句意是:--我不知道为什么他在考试中犯了这么愚蠢的错。--他本该交试卷钱检查一下的。选D。
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