— Must they clean and tidy the classroom now?

— Must they clean and tidy the classroom now?
— No, they . It after school in the afternoon.

A．mustn’t; must clean	B．needn’t; must clean
C．mustn’t; need be cleaned	D．don’t have to; can be cleaned

darlie2000 1年前已收到1个回答举报

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D

must构成的一般疑问句通常否定回答时用needn’t或don’t have to，本题的最后一句是被动句，结构为be+过去分词，即be cleaned，故本题选D。

1年前

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你能帮帮他们吗

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