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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1896

With his attention ________on the job,he didn't even look up when we came in.

A.to concentrate B.concentrating
C.concentrated D.having concentrated
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相关知识点

Withhisattentiononthejob,hedid