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 Morethanoneworker     senttothetrainingcentertoimprove...

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问题详情:

 Morethanoneworker     senttothetrainingcentertoimprove...

 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

【回答】

B

知识点:主谓一致

题型:选择题