【题目】He managed to reach the summit of his career, but it was at the ______ of his health.
A. consumption B. credit
C. exhaustion D. expense
在线课程【答案】D
【解析】
试题分析：A 消费，消耗；B 贷款，赞扬，认可；C 精疲力尽，耗尽；D 代价，消费。根据语境可知他成功地达到了事业的巅峰，但那是以他的健康为代价的，at the expense of sth.以……为代价，故选D。