◎ 题干
Our classroom _____ every day, so it's very clean.          
[     ]
A. cleans
B. is cleaning
C. is cleaned
D. 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“Our classroom _____ every day, so it's very clean.[ ]A. cleans B. is cleaning C. is cleaned D. cleaned…”主要考查了你对  【被动语态】【一般现在时】  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。