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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1042

We have been excavating layers of ash almost six metres thick, which suggests that they________the fire burning all winter.

A.should keep B.might have kept C.should have kept D.might keep
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Wehavebeenexcavatinglayersofas