Replace the underlined words with a possessive pronoun.

Решение:

Заменяем выделенные слова (притяжательные прилагательные с существительными) на притяжательные местоимения.

1. A: Is that your cola? B: No, it's not my cola. It's hers. My cola is in the fridge.
2. A: Whose car is this? B: It's ours. A: Your car? Wow!
3. A: Are these hot dogs Andrey and Nikolay's? B: No, they aren't Andrey and Nikolay's hot dogs. They are theirs. Andrey and Nikolay's hot dogs are on that table.
4. A: Is that Katya's cat? B: No, it's not Katya's cat. It's mine. Katya's cat is grey.

Ответ: hers; ours; theirs; mine.