Excuse me,is this watch y______?No,it's not mine.

Excuse me,is this watch y______?No,it's not mine. 王老师,Excuse me .Is this ( yours) (你的) hat?No,it's not mine.(我 is this ( ) watch no,it's not ( ) Excuse me.Is this your dictionary?No,it's not（）（ whose pen is this?is it yours?no it's not mine.maybe it's() Is this watch yours?No,mine is new._____Betty.I think it's h Whose coat is this Is it (　　　　）,Steve?----No.It's not mine . Excuse me,is it （ ）cat.No,it's not( )cat Excuse me.什么Is this your pen?No,it is not my pen.I什么it is Li 英语翻译is this your sweater ,joy?no’ it‘s not my sweater.mine i "is this coat yours?No,it's not mine."此句中为什么要用yours和mine? Excuse me,( ) is this your watch?