Her friends are very friendly.
Is that your uncle?
This dog isn't his.
Their aunt is a shop assistant and our is a nurse.
Where is her camera?
How many people are there in her city?
I'm going to visit your friend tomorrow.
These are theirs. Are they? (Здесь я не поняла, sorry)
He is from Japan. So he is 13. (по логике. тоже неясно)