Is this gutar your Yes,it is( )

Is this gutar your Yes,it is( ) Is this your book?Yes,it is is this your desk ------yes,it i______ Is this ball your?Yes,it's() Is this your key? ______A.Yes,it is B.NO,it is C.Yes,it isn' yes,it is your Is this a ____of your family?Yes,it is. Is this your shoe?Yes,it is.But where is___? Is this your pencil?Yes ,it is.变复数 Is this your c---- g-----?Yes,it is.thank you. is this your brother 回答 yes,it is is.this.your.family?yes.it.is 错在哪里?