1) How interesting the voyage is!
What interesting voyage!
2) How beautiful the garden is!
What a beautiful garden!
3) How brave the man is!
What a brave man!
4) How cute the baby is!
What a cute baby!
5) How comfortable the chair is?
What a comfortable chair!
6) What warm the sea is!
What a warm sea!
7) How tidy the room is!
What a tidy room!
8) How fashionable the shirt is!
What a fashionable shirt!