. I first met Mr Zhao nine years ago. He at a chemical college at that time.A. had worked

发布时间：2020-08-16 07:19:41


. I first met Mr Zhao nine years ago. He      at a chemical college at that time.
A. had worked
B. has worked
C. was working
D. had been working

网友回答

A. had worked
B. has worked
(答案→)C. was working
D. had been working
解析：可联系答.案.网客服索取。
以上问题属网友观点，不代表本站立场，仅供参考！