There isn't a fridge in the kitchen (я все равно сказала бы there is no fridge ....)
Steve is watching TV in the living room
present continuous tense, смотрит (когда?) прямо сейчас
The living - room is the biggest room in our flat.
без most, так как оно используется со словами, там где куча слогов, например difficult
There is a chair near the table.
Слово there (там) и their (их)
That is a carpet on the floor.
that - там