题目内容
9．-Mom，must I take out the trash now？-No，you ________．You may take a rest first．（ ）
| A． | mustn't | B． | can't | C． | shouldn't | D． | don't have to |
分析 --妈妈，我现在必须去倒垃圾吗？
--不，你不必．你可以先休息一下．
解答 mustn't 禁止，不要；can't不能，不会；shouldn't 不应该；don't have to 不必，没有必要．must的一般疑问句的否定回答应该用don't have to 或needn't．故选D．
点评 must的一般疑问句的否定回答应该用don't have to 或needn't．
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