So difficult it to adapt to the academic requirements of a Western university that I determined to take a preparation course.
A. I have felt
B. have I felt
C. did I feel
D. I did feel
网友回答
A. I have felt
B. have I felt
(答案→)C. did I feel
D. I did feel
解析：本题考查倒装结构。本题考查so + adj + 主谓倒装结构。根据语境时态用一般过去时。句意：很难适应西方大学的学术要求，我决心选一门预备课程。