— Who has made a mess in my room?
— Who else have done it but your naughty son?
A. would
B. could
C. should
D. must
网友回答
A. would
B. could
C. should
D. must
解析：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。句意：--谁把我的房间弄的一团糟？--除了你的调皮的儿子还会有谁呢？选B。