题目内容
The window is dirty.
I know.It ________for weeks
[ ]
A.hasn't cleaned
B.didn't clean
C.was't cleaned
D.hasn't been cleaned
答案:D
解析:
解析:
|
根据时间状语 for weeks可确定用现在完成时,且it与clean之间为被动关系,故用完成时的被动式。 |
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