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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1789

He works in a factory now, but he   on a farm for 20 years.

A.worked B.has worked C.had worked D.had been working
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Heworksinafactorynow,butheonaf