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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1887

When a new system _____, the old one is abolished.

A.came into being B.comes into being C.is come into being D.come into beings
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Whenanewsystem,theoldoneisabol