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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 944

People traveling long distances frequently have to decide ______they would prefer to go by land, sea or air.

A.which B.how C.why D.whether
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Peopletravelinglongdistancesfr