用all but,anything but,nothing but,noboby but,expect填空
1.This door is always left open __________ at night.
2.The city is _________ beautiful because you can see rubbish everywhere.
3.____________ he can do it.
4.Your answer is __________ perfect.And your gradeis 99 marks.
5.There's __________ a one-yuan coin in my pocket.