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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 699

A lot of language learning,__________ has been discovered, is happening in the first year of life, so parents should talk much to their children during that period.

A.as B.it
C.which D.this
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Alotoflanguagelearning,hasbeen