All her hard work in the end, and she finally passed the examA. paid backB. paid offC. b

All her hard work in the end, and she finally passed the exam．
A. paid back
B. paid off
C. brought out
D. brought off

A. paid back(答案→)B. paid offC. brought outD. brought off解析：考查词组意思，paid back意思“报答”， paid off意思“取得成功”， brought out意思“带出”，brought off意思“完成”，句子意思“经过她的刻苦学习最后取得了成功，她最后通过了考试”，所以选B

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