问题
选择题
—Did you see the traffic accident on East Street this morning?
— Yes, I _________ shopping with my friend Tina at the time.
A. have gone B. am going C. was going
答案
答案：C
此题重点考查过去进行时的基本结构和基本用法，表示在过去的某一时间正在进行的动作或存在的某种状态，其构成是was/were+doing。