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WiththeFAAplanningtorollouttheconceptwithinthenextfewweeks,air-controllersarealreadythealarm.A.poundingB.soundingC.knockingD.voicing选哪个?为什么?整句话应该怎么翻译?

题目详情
With the FAA planning to roll out the concept within the next few weeks,air-controllers are already _____ the alarm.
A.pounding B.sounding C.knocking D.voicing
选哪个?为什么?整句话应该怎么翻译?
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答案和解析
该是B吧
接下来几周内,随着联邦航天局计划提出的设想,空中管制已经敲响警钟.
sound the alarm 敲警钟