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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 376

One of the biggest problems in food production has always been that people have no reliable access to exact information, ____________ is often the case in China.

A.that B.what C.which D.it
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Oneofthebiggestproblemsinfoodp