Her design won the first prize in the competition. Years of patience and hard work had at

问题补充：

Her design won the first prize in the competition. Years of patience and hard work had at last .

A. put off

B. paid off

C. taken off

D. kept off

答案：

A. put off

(答案→)B. paid off

C. taken off

D. kept off

解析：考查短语辨析。put off 推迟，paid off 还清，得到回报，taken off 起飞，kept off 远离，句意：她的设计在比赛中获得了一等奖，几年的耐心和努力工作最终得到了回报。所以选B。