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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 903

— ______people travel  every year?
— Perhaps when we are talking about it. More than 100 planes have taken off around the world.

A.How many B.How much C.How long D.How often
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—peopletraveleveryyear?—Perhap