This is a book.对book 提问时what is it 对,还是what is this?

This is a book.对a book进行提问 This is a book 对划线部分提问This is a book（a book）.That is a red book（a red book）. This is a book.对book 提问时what is it 对,还是what is this? This is s book.(a book提问) This is a book答语 This is a book (对a 问题也是英文 Is this a book? Yes,this is. This is a red book.对red提问怎么答? This is a book 对划线部分提问 （划线部分 BOOK）大神们帮帮忙 this is my English book对my English book提问 This is my book .对book提问如何做 This is a book of mine.和This is a book of me.哪句话对?为什么? This is my book.对my提问 Whose book is this? whose is this book? This book is yours Lily,is this book()?