Вставить is there or are there.then,answer the questions 1)is there a chair in the room? yes,there is. armochairs in the carpet on the flowers on the books on the desk next to an pillows on the window next to the

1) Is there a chair in the room. - Yes, there is a chair in the room.
2) Are there three armchairs in the room? - Yes, there are three armchairs in the room. 
3) Is there a carpet on the floor? - Yes, there is a carpet on the floor.
4) Are there any flowers on the table? - No, there are no flowers on the table.
5) Are there any books on the floor? - No, there are no books on the floor.
6) Is there a desk next to an armchair? - Yes, there is a desk next to an armchair. (лучше бы the armchair, ведь речь, скорее всего, о конкретном кресле)
7) Are there any pillows on the sofa? - No, there are no pillows on the sofa.
8) Is there a window next to the table? - Yes, there is window next to the table.