Circle the best answers

Exercise 4. Circle the best answers.
1. (Your / Yours) child is not doing well in the school.
2. Are those children (your / yours)?
3. I could not understand (her/hers) intentions.
4. These cakes are (our / ours).
5. I cannot believe that you broke (my / mine) glasses.
6. Are these phones (their / theirs)?
7. (Their/Theirs) favorite teacher did not come yesterday.
8. That red bike is (our / ours).
9. I walked for 4 hours and now I cannot feel (my / mine) legs.
10. Is this cup (your / yours)?