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【题目】 The lady in red ___ be over fifty! She looks so young.

A. must B. can C. can’t

【答案】C

【解析】

试题分析:考查情态动词的用法。句意:这个红色衣服的女士肯定不超过50岁,她看起来那么年轻。must,can(could),may(maight) 可以表示猜测,must 表示肯定猜测,用于肯定句,肯定……,一定……;cant,表示否定猜测,肯定不……,另外can(could),may(maight),表示可能性猜测,可能……。根据句意,可知是否定猜测,故选C。

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