underline the right word to complete the sentences.Пример:this is MY/mine dog

Underline the right word to complete the sentences.
Пример:this is MY/mine dog (MY это правильный ответ)
2.is this pen your/yours.
3.that's me sister. Her/Hers name is Olya.
4.that house is our/ours.
5.is that your/yours car?
6.are these their/theirs sandwiches?
7.that's ours/our teacher,Mr Kapitonov.
8.that book isn't Bill's,it's mine/my.