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  • 更新 2022-09-04
  • 科目 英语
  • 题型 选择题
  • 难度 中等
  • 浏览 53

Shared bikes,which are environmentally friendly,______ quite popular among big cities in China since last April.(  )

A.becameB.have become

C.will become

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Sharedbikes,whichareenvironmen