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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1893

In order to prevent the fire spreading, some of the houses nearby
_____before the firemen arrived.

A.have been pulled down B.have pulled down
C.had been pulled down D.had pulled down
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Inordertopreventthefirespreadi