It's (their / theirs) door. They're new pupils and I don't know (their / theirs) names.
(Му/ Mine) flаt is bigger than (her / hers ).

They took (our / ours) books and we took (their / theirs).

Are these pencils (her / hers)?

Is this (your / yours) house or (their / theirs)?

It's theirs / their problem, not our/ours.

Is it yours / your article about spiders?

-No, it's not my / mine.

We know their / theirs address but they don't know our / ours.

My / mine parents live in Samara region, and your / yours?