题目内容
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
D
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题目内容
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
D