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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1787

His parents are very concerned about his son at school because he _______moving in his seat.

A.is always keeping B.always keeps C.does keep D.has always kept
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Hisparentsareveryconcernedabou