题目内容：

I first met Lisa three years ago.She _____ at a radio shop at the time.
A.has worked B.was working
C.had been working D.had worked
哪个正确,请分析一下为什么?

优质解答

B.was working 为正确选项.
表示过去某段时间一直做的事情,用过去进行时.