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— We did not see him at the lecture yesterday.
— You _______ him, since I went to an international conference with him.
A.mustn’t have seenB.can’t have seen
C.couldn’t seeD.needn’t have seen
B
考查情态动词。can’t have done不可能做某事。句意:——我们昨天在讲座上没看到他。——你不可能看到他,因为我和他参加一个国际会议。
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