【题目】Today is the best day of my life! Al my years of training as an engineer has finally .
A. took over B. picked up
C. paid off D. paid for
在线课程【答案】C
【解析】
考查动词短语辨析。A. took over接管；B. picked up捡起；C. paid off见成效；D. paid for为……付出代价。句意：今天是我人生中最美好的一天，我多年的工程师培训终于有了成效。根据句意可知此处表示“见成效”，故C项正确。