-----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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◎ 知识点
根据n多题专家分析,试题“-----The windows must have taken you quite a long time that day. ------Right. They for weeks.A.haven’t been cleanedB.hadn’t been cleanedC.didn’t cleanD.hav…”主要考查了你对 【一般现在时】,【将来进行时】,【过去完成进行时】,【过去将来时的被动语态】 等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。
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