-Mustwecollectthewastepaperandbottlesnow?-________．Youcandoitafterclas

发布时间：2020-08-04 15:27:42

-Must we collect the waste paper and bottles now?-________．You can do it after class．A.Yes, you mustB.No, you needn'tC.Yes, you mayD.No, you mustn't

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B解析根据题意“不必现在做”可知用否定形式，而must的否定回答用needn't。
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