We ___________ when the teacher came in.A．were talkingB．talkedC．talkD．are talki
题型：不详难度：来源：
We ___________ when the teacher came in.| A．were talking | B．talked | | C．talk | D．are talking |
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答案
| A |
解析
| A “正在做某事时，某事突然发生”常用when，即be doing sth. When sth. else did（用动词的过去式）。“我们正在谈话时，老师进来了。”故用过去进行时。故选A。 |
举一反三
When I was walking in the street, I saw a plane___________ over my head.| A．flies | B．flying | C．flew | D．fly |
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— When _________ you________ your teeth, Billy?
—Just now.| A．do; brush | B．have; brushed | | C．did; brush | D．was: brushing |
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—Why didn’t you go to the movie yesterday?
—Because I_________it before. | A．had watched | B．have seen | C．have watched | D．had seen |
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—I’ve_________it at home. | A．lost | B．forgotten | C．left | D．found |
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—Five.| A．win | B．to win | C．winning | D．won |
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