Therewasanaccidentinthefactory

发布时间:2020-07-28 06:16:01

There was an accident in the factory, but no one knew who was _________ of the trouble.A.at the end ofB.at the top ofC.in the middle ofD.at the bottom of

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D解析题意是“工厂里出现了事故,到底谁是祸首,没有人知道。”at the bottom of表示某事的根源,起因,导火索。A项,在……末端;B项,在……的顶部;C项,在……中间。
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