in the street,a terrible car accident happened,resulting in three deaths.
问题描述：
in the street,a terrible car accident happened,resulting in three deaths.
A While walking B Walk C Walking D When I was walking
答
这句话已经有了主谓结构：主语：a terrible car accident 谓语：happened;
所以只能加状语,而walk这个动作不可能是car accident 进行的,所以状语中要有人
即D选项：When I was walking