This book is ______(help)to the children.

This book is his.(改同义句)This book _______ ______ ______. Which is ______(boring),this book or that one? This book is ______(main) about how to protect yourself. This book is ______(help)to the children. Jim thinks this book is ______ (help) to us. This is an （English book) 对大括号的部分提问 ______ ______? Lily ______ ______ this new book ________. Whose book is this? This is a book whose is this book? This book is yours Lily,is this book()? this is ( ) book. This book is less important than that one.（同义句） This book is______ ______ ______this one. this book cost the same as that one.同义句 this book is _____ ______ _________that one This is ______ useful book. A. a B. an C. the D/This is ______ useful book.A. a B. an C. the D/要解释 1.This book is said ______ into several languages in the last five years. This book is the lightest and ______(thin)of all the books.