Cars.buses and bikes stop when the traffic light is red．( )A．canB．mustC．mayD．need 题目和参考答案——青夏教育精英家教网——

题目内容

17．Cars，buses and bikes __________ stop when the traffic light is red．（　　）

A．

can

B．

must

C．

may

D．

need

分析当交通灯是红色的时候，小汽车，公共汽车和自行车必须停下来．

解答答案：B．
can可能；must一定，必须；may可以；need需要．根据when the traffic light is red，可知当交通灯是红色的时候，小汽车，公共汽车和自行车必须停下来，must一定，必须．故选B．

点评本题考查了情态动词的用法．解答时注意理解句意以及所给选项的意思并作出正确选择．

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