— The windows must have taken you quite a long time that day.— Right. They ____ for weeks. [ ]A. haven't been cleaned B. hadn't been cleanedC. didn't cl-高中英语-n多题

◎ 题干

— The windows must have taken you quite a long time that day.
— Right. They ____ for weeks.

A. haven't been cleaned
B. hadn't been cleaned
C. didn't clean
D. haven't cleaned

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◎ 解析

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◎ 知识点

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