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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 2043

In the 1960s,a lot of old city walls in Beijing________because people thought them useless.

A.pull down
B.have pulled down
C.were pulled down
D.had pulled down
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Inthe1960s,alotofoldcitywallsi