Напишите 5 предложений с ортикалями a и еще 5 с ортикалями an

1)We have bought a car.
2)A cow is an animal.
3)Buy a milk.
4)Could you bring me a coffee?
5)There is a big painting on the wall.

1)An apple is a fruit.
2)He is an engineer.
3)He is an American.
4)I wonder if there is an accountant in the company.
5) She opened a door and stepped onto an open platform.