Ответ:
- His flat is spacious.
- Is Ruth your sister?
- This camera isn't mine.
- This little puppy isn't ours.
- Tina and Susan are my friends.
- What's your phone number?
- Is this skateboard his?
- Their house is very modern.
- Are these books hers?
- What is his address?
В предложениях 30, 31 и 34 без контекста возможны и другие местоимения из предложенных вариантов: her в №30, her в №31 и her в №34. Выбор зависит от того, о ком говорится.
