I have been working with Lily for years and never before her so serious!A. I foundB. I ha

问题补充：

I have been working with Lily for years, and never before her so serious!

A. I found

B. I have found

C. did I find

D. have I found

答案：

A. I found

B. I have found

(答案→)C. did I find

D. have I found

解析：句意：我和Lily共事多年，从来没见过她如此严肃。never置于句首，后面要用部分倒装。