1. Is there.. a carpet in the room? - Yes, there is.
2. Is there.. a window in the room? - Yes, there is.
3. Are there .. two tables in the room? - No, there aren't.
4. Are there..(two) armchairs in the room? - Yes, there are.
5. Is there..a sofa in the room? - Yes, there is.
6. Is there..a lamp in the room? - Yes, there is.
7. Is there.. a bookcase in the room? - No, there isn't.
8. Are there.. paintings in the room? - Yes, there is one.