2)
hard to answer, unusual profession, to bexome a cosmonaut, to discover new lands, to become a movie star, to become a pop-star, to become famous, to know exactly, the best way, to get ready to a future job, to get a good education, in several years, many more new professions, to resolve (fix) a problem, to have good health, to face difficulties and changes.

3)
1. In future I want to be a vet.
2. I would like to be in a field of animals' health.
3. I know that this profession is very important because not only people need help. Animals are also very vulnerable and they need our care and attention.
4. This profession is very old.
5. To get this profession I need to study in a medical institute.
6. Our life changes very quickly and new fields appear nearly every day. It means that new professions become important. And it is very good, I suppose.
7. Yes, education and training are necessary to be successful in our life. Having no knowldege, no skills you will never be able to develop and reach success.