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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1746

I have been living in the United States for twenty years, but seldom __________ so lonely as now.

A.have I felt B.I had felt C.I have felt D.had I felt
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IhavebeenlivingintheUnitedStat