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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
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16. There was so much noise produced by the machine outside that the professor had to ______ his voice so that it would not ________.

A.rise; be drowned B.lift; drown C.increase; drown D.raise; be drowned
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相关知识点

16.Therewassomuchnoiseproduced