问题补充：
His mother him when he won the Olympic gold medal in Beijing .
A. pay attention to
B. laughed at
C. took pride in
D. was serious about
答案：
A. pay attention to
B. laughed at
(答案→)C. took pride in
D. was serious about
解析：此题重点考查短语辨析，pay attention to注意；laugh at嘲笑；take pride in感到骄傲；be serious about 认真的，根据题意“当他在北京获得奥运会金牌时他妈妈为他感到骄傲”故选C
