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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1519


These kids are quick at learning. We had better have them __ in a new way.

A.having been trained B.training C.being trained D.trained
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Thesekidsarequickatlearning.We