This is my book,and that is his book(改为复数句）

OK,and this is my book. Ok,and this is my book and this is your pencil case ,Jane. This is my book and that is your book.（改为同义句） This is my book,and that is his book(改为复数句） This is my book.This book is mine造句 this is my book. this book is mine 区别是什么? OK.and this is my book.And thr is your pencil case Jane This is my book.对my提问 Whose book is this,It’s _.My parents bought it for my sister and me. this is my English book对my English book提问 is my ruler and that his book is (.)that 是 this This is my book 变为一般疑问句 同义句转换This is my book. 改错题：This is a my book. This is my book用whose提问 this is my book=什么? this is my book.改为一般疑问句. This is my book改为同义句