◎ 题干
—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
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—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 …”主要考查了你对  【被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。