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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1344

________ is often the case with human beings, many animals sleep a lot when young, but sleep much less when they get older.

A.Which B.What
C.As D.That
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isoftenthecasewithhumanbeings,