◎ 题干
The children _____ the windows already, so the classroom looks much brighter.
[     ]
A. are cleaned
B. will clean
C. are cleaning
D. have 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“The children_____ the windows already, so the classroom looks much brighter.[ ]A. are cleanedB. will cleanC. are cleaningD. have cleaned…”主要考查了你对  【现在完成时】【主谓一致】  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。