题目内容
17．It isn't going to rain，so you take an umbrella with you．（ ）| A． | mustn't | B． | shouldn't | C． | needn't | D． | can't |
分析 天不会下雨，所以你没有必要带雨伞．
解答 答案：C．A．mustn't禁止 B．shouldn't 不应该 C．needn't 没有必要D．can't不可能．根据It isn't going to rain，可知天不会下雨，所以你没有必要带雨伞． needn't 没有必要．故选C．
点评 本题考查了情态动词的用法．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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