问题补充:
---The window is dirty.
---I know. It for ages and I’m considering giving the task to our children.
A. hasn’t cleaned
B. hasn’t been cleaned
C. wasn’t cleaned
D. didn’t clean
答案:
A. hasn’t cleaned
(答案→)B. hasn’t been cleaned
C. wasn’t cleaned
D. didn’t clean
解析:考查时态语态:句意:--这个窗户很脏。--我知道,已经很长时间没擦了,我在考虑把这个任务给孩子们。可知窗户是过去到现在很长时间没有被擦,用现在完成时的被动。选B。