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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 725

Since we ____ for almost two weeks, I’ll need to buy a large backpack in advance to carry my supplies of food and water.

A.have walked B.will be walking
C.have been walking D.walked
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Sinceweforalmosttwoweeks,I’lln