单选题 All her hard work ______ in the end, and she finally passed the exam.
A. showed off B. paid off C. left off D. kept off

【正确答案】 B
【答案解析】本题考点为动词的固定搭配。A项意为“炫耀”,B项意为“还清,偿清”,C项意为“停止;结束”,D项意为“让开,不接近”。根据上下文,选项B为正确答案。