Ответ:

1. If I were old enough, I would receive a pension

2. If my friends come to my house today, we will watch films together

3. If I was rich, I would donate money to charities

4. If someone invited me to London, I would go there with that person

5. If my friends forgot my bday, I would never talk to them anymore

6. If I wanted to lose a weight, I would stop eating so many pizza

7. If I studied harder, I would be proud of myself

8. If I go to the beach, I will not swim because it's to cold outside