There are some books on the shelf
There are some toys in the box next to the wardrobe
There is a train, a ball on the carpet
There is a poster over the bed
There is a pillow, a teddy on the bed
Ошибки в решении: There are a train, a ball on the carpet - неверная форма сказуемого, There is a pillow, a teddy on the bed - лишнее сказуемое