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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 555

The survey shows that ______ we are enjoying less and less good sleep, rates of heart diseases have risen rapidly.

A.while B.although C.if only D.as though
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Thesurveyshowsthatweareenjoyin