---The window is dirty.---I know. It for ages and I’m considering giving the task to our

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。