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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1977

Mr. Bob, ______ as a manager for many years, found it hard to be an ordinary clerk again.

A.having worked B.worked C.to have worked D.working
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Mr.Bob,asamanagerformanyyears,