— work in Microsoft? —Yes I did.A. Did you used toB. Did you use toC. Do you used toD. Wa

问题补充：

— work in Microsoft? —Yes, I did.

A. Did you used to

B. Did you use to

C. Do you used to

D. Was you use to

答案：

A. Did you used to

(答案→)B. Did you use to

C. Do you used to

D. Was you use to

解析：你以前在微软工作吗？是的，以前是。Used to do sth.过去常常做某事，其一般疑问句用助动词did， Did…use to…?故选B。