问题补充:
—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:
A. hasn’t cleaned
B. didn’t clean
C. wasn’t cleaned
(答案→)D. hasn’t been cleaned
解析:考查时态语态,因为窗户是几个星期没有被檫了,所以用现在完成时的被动语态,句意是:--窗户很脏。--我知道。有几个星期没有檫了。选D。