题目内容
12．-May I smoke here？-No，you ．This is a no-smoking room．（ ）
| A． | needn't | B． | mustn't | C． | need | D． | wouldn't |
分析 --我可以在这里吸烟吗？
--不，你不准．这是无烟区．
解答 答案：B needn't，没有必要；mustn't，禁止，不；need，需要；wouldn't，将不，不会；根据No，在这里是一个否定回答，以May开头的问句，它的否定回答应该用mustn't．故选B．
点评 情态动词是中考的热点，情态动词除了表推测外，还可以表达另外的意思，如must理解为必须，由这个词所开头的问句，肯定回答用Yes，you must．否定回答用No，you needn't或者是No，you don't have to．注意不用mustn't，因为mustn't表示例行禁止的含义．
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