I along the road when I saw Peter. So we stopped and had a chat.A. walkedB. was walkingC.

问题补充：

I along the road when I saw Peter. So we stopped and had a chat.

A. walked

B. was walking

C. would walk

D. had walked

答案：

A. walked

(答案→)B. was walking

C. would walk

D. had walked

解析：考查时态。本题的时间状语是when I saw Peter,是一个过去的时间点，故指在过去的时间点上发生的事情，使用过去进行时。故B正确。