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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 529

At a beach or a swimming pool a lifeguard is a person who is responsible for __________ other swimmers and protecting them from accidents.

A.turning to B.watching over C.watching out D.digging out
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Atabeachoraswimmingpoolalifegu