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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1656

They considered          a computer, which was considered       a great help in their work.

A.to buy; to be B.buying; being C.to buy; being D.buying; to be
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Theyconsideredacomputer,whichw