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--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:D
解析:

根据时间状语“for weeks”可确定用现在完成时,表示(到现在为止)已经有好几周没有擦窗户了。


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