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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:318

The Yellow River      flood large areas, but now the waters of it are used to     energy.

A.was used to; producing B.used to; producing
C.was used to; produce D.used to; produce
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TheYellowRiverfloodlargeareas,