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He the 6:30 train because he didn't leave until 6:35 .A.couldn'tB.may not have c

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He the 6:30 train because he didn't leave until 6:35 .A.couldn'tB.may not have c

He ________ the 6:30 train because he didn't leave until 6:35 .

A.couldn't

B.may not have caught

C.can't have caught

D.mustn't catch

试题答案

C

解析：

导解：既然6：35才出发，那么肯定没赶上6：30的车，用情态动词+完成式表示对过去动作的推测．

标签：didnheleaveuntilthe

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