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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1823

More than one worker      sent to the training center to improve their working skills in the past three years.

A.is B.has been
C.are D.have been
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Morethanoneworkersenttothetrai