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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 988

People have lots of problems living in the central Australian desert, ____ the lack of water is the most serious one.

A.of which B.which C.for which D.where
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Peoplehavelotsofproblemsliving