1. Is this (your/yours) book?
2. It’s (their/theirs) door, not (our/ours).
3. They’re new pupils and I don’t know (their/theirs) names.
4. (My/mine) flat is bigger than (her/hers), but (her/hers) is nicer.
5. That’s not (my/mine) book. (My/Mine) is new.
6. They took (our/ours) books and we took (their/theirs).
7. Are these pencils (her/hers)?
8. Is this (your/yours) house or (their/theirs)?