用名代:mine,yours,his,hers,its,ours,yours,theils各造句两答:there are three books ,mine are the green one.is this bike yours?No,it's his.this birthday cake is yours.is that bike his?Yes,it is.look,there are two watches.the green one is yours,and the other one is his.is this dress your mother's?Yes,it's hers.those cakes are...