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