Употребить оборот there is/ there are.
1. ... two arm-chairs and a table in the middle of the room.
2. ... a book on the table.
3. ... twenty students in our group.
4. ... three cats in the basket.
5. ... a picture on the wall.

1. There are two arm-chairs and a table in the middle of the room. 2. There is a book on the table. 3. There are twenty students in our group. 4. There are three cats in the basket. 5. There is a picture on the wall.