题目内容
— Must we clean the classroom now?
— No, you needn't. It _____ after school.
A. may clean B. must clean C. need be cleaned D. can be cleaned
D
【解析】考查情态动词及被动语态的用法。由句意可知it指classroom,it和clean为被动关系,所以用被动语态,含有情态动词的被动语态结构为“情态动词+be+动词过去分词”。排除A和B。need意为“需要”,can意为“可能,可以”。由句意“—我们必须现在就打扫教室吗?—不,不必要。可以放学打扫”可知。故选D。
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