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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 1773

There is a new problem  ____in the popularity of private cars ____ road conditions need to be improved .

A.involving ; that B.involved ; that
C.involved; where D.involving ; which
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Thereisanewprobleminthepopular