—Why haven’t you asked her to come here?
—She _______ an important experiment when I found her.
—She _______ an important experiment when I found her.
A.has done | B.was doing | C.is doing | D.will do |
更新时间:2023-07-10 18:54:29
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【知识点】 过去进行时含when、while解读
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