Whose book is this?It is mine.这句话哪里错了?

Whose book is it It's mine book,这句话哪里错了? this book is mine book.哪里错了?怎么改? Whose book is this?It's_____.A.mine B Whose is this book?这句话对吗? Whose book is this?---IT IS ( )A.me B.he C.she D.mine Whose book is this It's ___ .(要填 my .mine.还是 me) whose book is this?It's( ). whose is this book? Whose book is this? Whose textbook is this?It is mine.3Q this book is mine. Who bag is that?Whose is that girl?This book is mine book.Th