题目内容
— Must they clean and tidy the classroom now?
— No, they . It after school in the afternoon.
— 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 |
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。
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