along the quiet road at forty miles an hour，and then an old man suddenly started to cross the road in front of me.
A. Driving
B. I was driving
C. Having driven
D. When I was driving
网友回答
A. Driving
(答案→)B. I was driving
C. Having driven
D. When I was driving
解析：因句中有连词and,所以and 之前必须是一个并列关系的分句。