1、Is it___your_(you)eraser?No,it's not___mine__(I).It's__his__(he).2、Do you have__your__(you)umbrella?yes,I have__mine___(I).3、___His_（he)bag is heavier than___hers__(she).4、Whose bedroom is bigger,_ours__(we)or__theirs__(they)?5、Whose knife is it?It's_hers___(she).6、I have an orange car.The orange car is__mine__(I).7、He has a bike .is_his__(he).8、He is doing his homework now ,and she is doing__hers___(she),too.9、Whose desks are those They are _theirs___(they).