◎ 题干
— The window is dirty. 
— I know. It _____ for weeks.
A. hasn't cleaned
B. didn't clean
C. wasn't cleaned
D. hasn't been 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“—The window is dirty.— I know. It _____ for weeks.[ ]A. hasn't cleanedB. didn't cleanC. wasn't cleanedD. hasn't been cleaned …”主要考查了你对  【现在完成时的被动语态】  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。