Complete the tag questions. 1)Maths is more difficult than Russian,.... 2)We don't have Music twice a week,... 3)Mary

1)Maths is more difficult than Russian, isn\'t it?2)We don\'t have Music twice a week, have we?3)Mary saw an interesting film yesterday, didn\'t she?4)He always gets good marks in Sport, doesn\'t he?5)My friends aren\'t good at Music, are they?6)Mike will go to school next year, won\'t he?