Ответ на вопрос: 3. There are twenty flats ___ this house. 4. There is a carpet ___ the floor. 5. Jeff is standing ___ the door. 6. There is a bookcase ___ the room. 7. She lives ___ the forest. 8. They are sitting ___ the grass. 9. There are five rooms ___ her house. 10. The children are ___ the park. 11. There is an apple ___ the table.