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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 212

     should teenagers spend at least 30 minutes taking exercise?
—Five times a week,according to some reports.

A.How much B.How soon
C.How long D.How often
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—shouldteenagersspendatleast30