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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1611

Unlike the fossil fuels of today, biofuels are renewable sources, which mean that they will not ____ easily.

A.come out B.break out C.turn out D.run out
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Unlikethefossilfuelsoftoday,bi