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“Did Jim come?” “I don’t know. He _______ while I was out.”
A.might have comeB.might come
C.mush have comeD.should have come
A
根据句中有关时态可知“他来”发生在过去,故排除B;根据 I don’t know 可知选项C语气太肯定,不合适;选项D的意思是“本来应该来”,与语境不合。
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