1.These are Kate and Mike’s bags.They are_________.(they,them,their,theirs)

1.These are Kate and Mike’s bags.They are_________.(they,them,their,theirs)
2.Those are my books.Please put ________in the bag.(they,them,their,theirs)
3.Who is _________ English teacher?(they,them,their,theirs)
4.This bike is ________ (my,me,mine,I )
5.And that bike is _________( you,your,yours,yourself)