－Here is a schoolbag. Whose is it?

Here is a schoolbag.Whose is it.Oh it's（）.thank schoolbag,is,your,it 怎没连 Do you know( A.is it whose pen B.whose pen is it C.whose pen what a nice MP5 whose is it It is a green schoolbag.(改为否定句) Whose badroom is it? whose coat it is? whose hat is it Whose it is? Whose jacket is it? whose puppet is it? whose jacket it is