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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 920

Helen has two sisters and a brother. Her brother is working, but _________her sisters are still at school.

A.neither B.either C.all D.both
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Helenhastwosistersandabrother.