What is this?Is it nice?

what Nice backpackage it is! what is this?-It is. What is this?It is 写单词,补充句子This is our classroom .It is _______ nice room.What What _____ this one I think it's very nice.How much is it -Look!This is my ruler.-It nice.- . This hat is nice.Put on it. （ ）this .It is very nice. 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!