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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1558

They ________ to enter the building by the back door; however, the front door was locked.

A.are supposed B.aren’t supposed C.weren’t supposed D.were supposed
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Theytoenterthebuildingbythebac