题目内容
--Is Jessica giving us a speech this evening?
---No, it _____be her. She _____to Japan.
A. mustn’t ;has gone B. mustn’t ;has been C. can’t ;has gone D. can’t ;has been
【答案】
C
【解析】
试题分析：句意：-Jessica今晚要给我们做演讲吗？-不，不可能是她。她去了日本。must 表示推测时，只能用在肯定句中，故A、B不对；否定句中表示推测用can；has been to 意为去过，已经回来了；has gone to 去了，还没回来。做演讲的不是Jessica，Jessica去日本还没回来，故选C。
考点：考查动词。
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