【题目】The new headmaster _____ at our party and sang us a song, which greatly added to our joy.
A. put off B. set off C. turned up D. broke up
在线课程【答案】C
【解析】
试题分析：A. put off 推迟，延期；B. set off 动身，出发；C. turned up 出现，露面；D. broke up 分解，分手，破裂。根据语境可知新校长出席了我们的派对并给我们唱歌，turn up 符合语境，故选C。