Is this your ________activity book?(teacher) No.It's______(J

is this your book?no,it's 什么.（提示he) Is this your book?No,I think it's____? Is this your book?Yes it's_ book _your teachers short?No,the Is this your book?Yes,it is Is this your book?( ),it's( ) —Is this your book?-no,it 's not my _____ Is this（）book?No,it's（）book. is this your notebook no,it is Is This your pen?No ,it's__________ Whose book is this? It( )our geography teacher's. This is not my dictionary.It's______ Is this your book?