--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。句意：—窗户很脏。—我知道。已经几个星期没有洗了。根据句子的时间状语for weeks可知与完成时连用，在根据句意说明使用被动语态。故D正确。