So difficult it to live in an English-speaking country that I determined to learn English

问题补充：

So difficult it to live in an English-speaking country that I determined to learn English well.

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：可联系答.案.网客服索取。