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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1121

Mr. Smith works as a government official now, but he ______ in a middle school for 5 years.

A.has worked B.worked C.had worked D.had been working
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Mr.Smithworksasagovernmentoffi