问题
选择题
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
答案
答案：B
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。