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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 804

This machine, ______for many years, is still working perfectly.

A.after which I have looked B.which I have looked after
C.that I have looked after D.I have looked after
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Thismachine,formanyyears,issti