----Thank you very much for giving me a hand when I was in trouble.
------Don’t mention it. I only did what anyone else in my place.
A. must do
B. might do
C. would have done
D. can have done
网友回答
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。本题是对过去所发生情况的说明，所以使用情态动词+have done;句意：—非常感谢你在我有麻烦的时候帮我忙。