While riding in the street, .
A. someone called me from behind
B. I heard my name called
C. my bike broke down
D. an old man knocked down
网友回答
A. someone called me from behind
(答案→)B. I heard my name called
C. my bike broke down
D. an old man knocked down
解析：
这题考查状语从句的省略式，当主从句的主语一致时，可以省略从句中的主语和be动词，由此可以推断，主句的主语是I，所以选B。