◎ 题干
—What a nice classroom!
—It _____ every day.
A.is cleaning B.has cleaned C.must clean D.is cleaned
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“—What a nice classroom! —It _____ every day.A.is cleaningB.has cleanedC.must cleanD.is 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。