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题型：单选题题类：常考题难易度：普通

过去进行时（专题）

While we _______, the teacher came in.

A、to talk B、were talking C、talk D、are talking

举一反三

While my mother was cooking, my father was newspaper.

We _______ supper when the phone rang.

It _____ hard when I left my office.

He told me he soon.

When I got there, he _____________ on the sofa.

They _____ a football game from 7 to 9 last night.

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