I first met Lisa three years ago. She at a shop at the time.A. has worked 　B. was workin

问题补充：

I first met Lisa three years ago. She at a shop at the time.

A. has worked

B. was working

C. had been worked

D. had worked

答案：

A. has worked

(答案→)B. was working

C. had been worked

D. had worked

解析：某个时候正在做什么用进行时态。