My sister came back while we ________ homework.
A.are doing | B.did | C.was doing | D.were doing |
更新时间:2023-03-12 22:20:37
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【知识点】 过去进行时含when、while解读
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【推荐1】Poor thing! Jack ______a fall while he ______on the ice. He got hurt badly.
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【推荐2】They ________ on the sofa when the telephone ________.
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