问题
选择题
-----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．had done
答案
答案：B
考查情态动词用法。Could have done 可能做某事；是对过去所发生事情的推测。句意：—谁把我的房间弄乱的？—除了你调皮的儿子还有谁可能做了这件事情啊？