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.