Преобразуйте подчеркнутые существительные во множе-ственное число и произведите все необходимые изменения.
1. The sheep is eating grass.
2. Her brother in law is an engineer.
3. The roof of this house is flat.
4. This is the plan of this report.
5. There is a yellow leaf on the ground.
6. This is a black tie.