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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 489

My brother was playing with his friends in a wildlife park________she was bitten on the leg by a lion.

A.when B.while
C.since D.once
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Mybrotherwasplayingwithhisfrie