题目内容
9.-Is that boy Tom?-It ___________ be Tom.He has gone to his hometown to visit his grandparents.( )
| A. | can | B. | can't | C. | must | D. | mustn't |
分析 --那个男孩是汤姆吗?
--那一定不是汤姆.他回家乡看望他祖父母了.
解答 答案B.can和must都可表示推测,can用在否定句和疑问句,must用在肯定句,由后文知汤姆回家乡看望祖父母,所以前面应否定推测,否定句应用can't,表较有把握的推测意为不可能.故选B.
点评 考察情态动词的运用,注意can和must的区别.
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