There is...
There is a teddy bear in the box. ✓
There is a cat in the box. ✓
There is a rabbit in the box. X
There is cars in the box. ✓
There is a mouse in the box. X
There are three boxes on the shelf.
There are dolls on the shelf.
There are nine books on the shelf.
There are balls on the shelf.
There are a car on the shelf.
There are a teddy bear on the shelf.