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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 862

Commercially packaged caramel apples from the USA were reported to have killed at least 7 people and sickened 32 before July 24, 2015, officials said. Typically, problems arise ______ caution is absent.

A.that. B.what
C.where D.in which
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Commerciallypackagedcaramelapp