He built up the business______his health.

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问题 He built up the business______his health.

选项 A、at expense of
B、to the expense of
C、at the expense of
D、on expense of

答案C

解析 句意:他以他的健康为代价创立了他的事业。at the expense of sth.是固定词组,表示“以……为代价”。因此本题应选C项。
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