So difficult it to work with him in the same company that I determined to find another jo

问题补充：

So difficult it to work with him in the same company that I determined to find another job.

A. I have felt

B. have I felt

C. I did feel

D. did I feel

答案：

A. I have felt

B. have I felt

C. I did feel

(答案→)D. did I feel

解析：这是一个以So difficult 开头的句子，强调状语，所以要用倒装语序。