Ответ:

  1. Does the bike belong to Oleg? — Yes, it’s Oleg’s bike.
  2. Does the scooter belong to Vera? — Yes, it’s her scooter.
  3. Does the encyclopedia belong to Marina and Sveta? — Yes, it’s their encyclopedia.
  4. Does the boat belong to Kirill and Roman? — Yes, it’s their boat.
  5. Does the house belong to your grandparents? — Yes, it’s their house.
  6. Does the garage belong to his uncle? — Yes, it’s his garage.
  7. Does the car belong to her parents? — Yes, it’s their car.
  8. Does the tent belong to Larisa and Alina? — Yes, it’s their tent.