问题补充：
Jenny works hard as usual and it has．She got the first in the final exam again ．
A. showed off
B. paid off
C. paid back
D. turned up
答案：
A. showed off
(答案→)B. paid off
C. paid back
D. turned up
解析：（本题考查动词词组辨析。A．show off炫耀 B．paid off在此是回报的意思 C．paid back还掉D．turn up出现。根据句子意思：Jenny像平常一样努力工作，并且期末考试又考了第一，她得到了回报。所以应选B。）
