Choose the appropriate form of the pronouns in brackets.
1. If the book is neither (her, hers) nor (their, theirs), it should be (your, yours).
2. (Their, Theirs) answer was not much better than (our, ours).
3. I‘ll take (my, mine) friends to the opera.
4. I cannot tell you which of these photos are
(your, yours) and which are (my, mine).
5. (Our, Ours) boat was fast but (their, theirs) was the fastest.
6. She is an old friend of (our, ours).
7. You can very well do without (her, hers) help, but not without (their, theirs).​