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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1688

The number of historic buildings which ________ has reached a surprising figure that we must be aware of.

A.has been pulled down B.had been pulled down
C.is being pulled down D.have been pulled down
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Thenumberofhistoricbuildingswh