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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 1457

A subway is an effective way to solve traffic problems in_________big city. It has evident advantages, such as_______speed and convenience.

A.the; the B.a; the C.a; / D.the; a
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Asubwayisaneffectivewaytosolve