—Who has made a mess in my room?
—Who else it but your naughty son?
A. could do B. could have done C. did D. has done
—Who has made a mess in my room?
—Who else it but your naughty son?
A. could do B. could have done C. did D. has done
B
考查情态动词用法。语境表示对过去发生并延续到现在的情况的推测，用could have done表示不肯定的语气。