We________forthreehours________we

发布时间:2020-07-10 15:03:39

We ________ for three hours ________ we finished cleaning the house.













A.worked; before












B.didn't work; until











C.have worked; before











D.haven't worked; until

网友回答

A解析尽管句中有for短语作状语,但表示与现在没有关联的过去动作,仍用一般过去时。
以上问题属网友观点,不代表本站立场,仅供参考!