This book is _______

This is a book(改复数) _______ _______ book This book is very _______ ,but that one is much_______ This book _______ Lucy’s . Look! Her name is on the book cov whose is this book? Is this your book? this book is mine. Whose book is this? This book is yours This book is difficult_you_read. This is a book 1.This book will show you _______ from books is put into pra This is the _______(good) book you can buy.填什么?