—Thank you very much for giving me a hand when I was in trouble. —Don’t mention it. I only

问题补充：

—Thank you very much for giving me a hand when I was in trouble.

—Don’t mention it. I only did what anyone elsein my place.

A. must do

B. might do

C. would have done

D. can have done

答案：

A. must do

B. might do

(答案→)C. would have done

D. can have done

解析：考查情态动词用法。表示对过去情况进行推测用情态动词+have done,排除AB，Would have done会做某事；句意：我只是做了任何一个在我的位置上的人都会做的事情。