All her hard work ______ in the end, and she finally passed the exam．A.paid backB.paid offC.brought outD.brought off
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B解析试题分析：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考点：考查词组意思
点评：词组要靠平时多记多积累，固定词组in the end意思“最后”， passed the exam意思“通过考试”。