题目内容

— 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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