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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 892

The engineers made two big plans for the dam, ____ was never put in force.

A.one of them B.which C.one of which D.every one of which
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Theengineersmadetwobigplansfor