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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 1917

The students _______ busily when Miss Brown went to get a book she _______ in the office.

A.had written, left B.were writing, has left C.had written, had left  D.were writing, had left
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ThestudentsbusilywhenMissBrown