问题补充：
When what made him a popular person, he said it was his personality.
A. asking
B. asked
C. being asked
D. ask
答案：
A. asking
(答案→)B. asked
C. being asked
D. ask
解析：考查省略句，当主从句的主语一致时，可以省略从句的主语和be动词，when asked=when he was asked，句意是：当有人问他，是什么使他成为受欢迎的人，他说是因为他的个性。选B。
