---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
网友回答
A. hasn’t cleaned
B. didn’t clean
C. wasn’t cleaned
(答案→)D. hasn’t been cleaned
解析：考查时态和语态。结合上下文可知用现在时态，从时间状语for weeks可知使用现在完成时，并且window与clean之间为被动关系，故选D答案。句意：——窗户脏了。——我知道，已经几个星期没有清洁了。