题目内容
20.We _____ be careful enough when we cross the road.( )| A. | may | B. | can | C. | must |
分析 当我们过马路的时候我们必须很小心.
解答 答案:C.
结合选项可知本题考查情态动词,首先明确选项中每个单词的意思:A:可以;B:能够;C:必须; 结合题干推测句意是"当我们过马路的时候我们必须很小心.",所以must 符合句意,故选C.
点评 本题考查了情态动词的用法.解答时首先根据题干明确句意,理解所给选项中每个情态动词的意思并熟练掌握它们的用法,便可作出正确选择.
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