This book is different from the one that I read yesterday.为什么使用that我的意思是为什么不可以省略that?that为定语从句中的宾语,应该可以省略的啊?

Whose book is this? This is a book whose is this book? This book is yours Lily,is this book()? this is ( ) book. Is this a book? Yes,this is. This is s book.(a book提问) This is my book.This book is mine造句 this is my book. this book is mine 区别是什么? This book is ()(real) interesting 改错：is this book your? is ,an,book,english,this Whose is this book ?对吗? This book is about me. This is () useful story book.. is this her book?回答 This is ( ) book.your|yours