题目内容
4.-The traffic is very busy,isn't it?-Yes.We _________ be careful when we cross the street.( )
| A. | may | B. | must | C. | can't | D. | mustn't |
分析 --交通非常繁忙,是吗?
--是的.当我们过马路的时候一定要小心.
解答 答案:B.may可以;must一定,必须;can't不可能;mustn't不可以.根据The traffic is very busy,可知交通很拥挤,所以我们过马路的时候一定要小心.must一定,必须.故选B.
点评 对待此类考查情态动词的题目,首先要认真审题,结合所给出的语境,正确把握说话者的语气、情感、态度、观点等.其次要认真思考所给选项中情态动词的基本特征和用法,并结合语境推敲答案.
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