Ответ:

Переставляем слова, сохраняя нужные притяжательные формы и грамматический порядок.

  1. I went to the cinema with a friend of mine.
  2. Some friends of my parents went on holiday with theirs.
  3. Anna gave me her phone number.
  4. Whose books are these? Yours or mine?
  5. Kevin is going out with his friends this evening.
  6. Our neighbours have got 3 children, but I don't know their names.
  7. We took our car and they took theirs.