Question

【題目】---The window must have taken you quite a lot of time that day.
--- You are right. They ________ for weeks.
A.haven't been cleaned
B.hadn't been cleaned
C.didn't cleaned
D.haven't cleaned

Answer 1

【答案】B
【解析】窗戶是被擦干凈，所以用被動式，只能在AB之間選，根據(jù)句意：--那天擦窗戶一定花了你很多時間，--對，它們幾個星期沒擦了。因為那天擦過了，所以用過去完成時。選B。