题目内容
15．-Must I take an umbrella？-No，you ______．Umbrellas are offered if necessary．（ ）
| A． | mustn't | B． | needn't | C． | shouldn't | D． | can't |
分析 --我必须拿一把雨伞吗？
--不，你不必．如果有必要的话，会提供伞的．
解答 答案：B．根据No，you ，Umbrellas are offered if necessary，可知你不必拿雨伞，在这里是作出否定回答．由must引导的一般疑问句表示否定回答时需要用needn't或don't have to来回答．故选B．
点评 情态动词的考查．回答以must引导的一般疑问句，肯定回答用Yes，Sb must．"是的，…必须"；否定回答用No，Sb needn't"不，…不必"．
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