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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 672

It has been proved______eating vegetables in childhood helps to protect you against serious illnesses in later life.

A.if B.because C.when D.that
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Ithasbeenprovedeatingvegetable