Помогите пожалуйста с английским , номер 4 и 5 отмечены .

4) there are five children in the park
There is a cat on the sofa
There are three little balls on the floor
There are two apple-trees in the yard
There a big dog in the hall
There are four birds in the tree
There are a lot of flowers in the field
There are three peach in the tree
There is a cake in the picture

5) there are three potatoes on the table
There aren't pupils in the classroom
There is a lemon on the plate
There aren't cars in the street
There is one bottle of Coca-cola in the fridge
There is a pencil -box in the school bag
There are two women in that car
There is a nice kitten on the chair
There is a rose in the beautiful vase