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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1579

The young man stopped and looked back as if ______ whether he was being followed.

A.seeing B.to have seen C.having seen D.to see
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Theyoungmanstoppedandlookedbac