Выбрать правильный вариант: there is или there are

1 There are four rooms in my flat.
2 There is one window in the living room.
3 There is a carpet in the middle of the room.
4 There is a big sofa in the corner of the living room.
5 There are two armchairs in the room.
6 There is a telephone in the hall.
7 There is a bathroom in my flat.
8 There is a nice bedroom in my flat.
9 There are many beautiful flowers in the kitchen.
10 There two balconies in my flat.