is this your book?no,it's 什么.（提示he)

is this your book?no,it's 什么.（提示he) Is this your book?( ),it's( ) Is this（）book?No,it's（）book. —Is this your book?-no,it 's not my _____ Is this your book?No,I think it's____? Is this your book?Yes it's_ book _your teachers short?No,the It's your book.与This is your book.的区别? It's your book与This's your book. Is this your bike No ,it's ________(Li Lei ) Is this your ____ ruler?No,it's hers. IS this your cup?NO,it's not m Is this your book?Yes,it is