This book is made of papers 用了复数对吗?

This book is made of papers 用了复数对吗? Whose is this book ?对吗? this table is made of() this chair is made of( ) Is this your book ? 变为复数句 Is this a book?的复数句 this is a book改为复数形式 Is this your book?单复数句互变 Whose is this book?这句话对吗? this book is my own对吗 This is a photo of Emma's family.(变复数) It's a book in Englis This is a book(改复数) _______ _______ book