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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
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The manager is talking with his secretary _____ the telephone. They usually keep in touch _____ telephone.

A.by ;on B.through; by C.on; on D.by ;with
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Themanageristalkingwithhissecr