Is it your radio?Yes it is 改为复数

Is it your radio?Yes it is 改为复数 yes,it is your Is this a radio?是选择哪种回答：yes,it isn't. yes,it is. Is it your coat?yes,it's. Is that your estate Yes,it is Is this gutar your Yes,it is( ) is this your desk ------yes,it i______ ________________?(your,backpack) yes,it is . Is it your chick? Yes._____________ Is this ball your?Yes,it's() -Is it all right if I turn on the radio -Go ahead .(Yes,fine.)（请解释) Is it your book Yes,it is .与 Yes,it's mine.回答的区别? what is wrong ( ) your radio? what time is your radio Is it your telephone?—Yes,it’s ______(l) Is this your pencil?Yes ,it is.变复数 Is the girl your sister?Yes,it is 改错句 改错句 Is your pen black --------------------yes ,it is