Помогите пожалуйста.... Нужно вставить there is или there are

1. ________________ three chairs in the room.
2. ________________ a red carpet on the floor.
3. ________________ some armchairs next to the table.
4. _________________ a big tree in the yard.
5. __________________ some books in the bag.
6. _________________ two balls in the box.
7. _________________ a mirror in the bedroom.
8. __________________ some pens on the desk.
9. __________________ two pictures on the wall.