what nice hat it is 是不是用what

what nice hat it is 是不是用what what Nice backpackage it is! what a nice MP5 whose is it 1.What ( ) nice weather it is! What a nice day it is today? What a nice day it is! What a nice model ship (it is)! Your coat looks nice.What is it what nice weather it is=how nice the weather What nice weather it is today!nice weather的用法. T hat's just what it is.请翻译,谢谢 _____milk it is 1.how nice 2.what nice 3.how a nice 4.what a