1.If I were rich , I would buy a house next to the sea
2. Не понимаю суть вопроса
3. If I were .... I would be responsible for safety of spacemen
4. If the .... began , I would run away from city by car with my family
5. I would be very surprised
6. I would make schools better
7. A) if I were ... I would make order to plant more trees in the cities
B) I would create substance , that will destroy plastic
Удачи :)