You--cross the road when the traffic lights are red.It's dan

问题描述:

You__cross the road when the traffic lights are red.It's dangerous.A.needn't B.may not c.mustn't
1个回答 分类:英语 2014-10-17

问题解答:

我来补答
c mustn't
再问: 能说说为什么吗?
再答: mustn't 是禁止的意思,语气最强烈
 
 
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