将下列句子改成感叹句.
1.It is fine day today.
_________ _________ _________ day it is today!
2.They are having a wonderful time.
_________ __________ ___________ _________ they are having!
3.Your garden is beautiful.
_______ _________ your garden is!
4.The problem is difficult.
________ _________ the problem is!
5.The underground train is fast.
_________ __________ the underground train is!