Вставить нужный предлог at for to after of in by from 1. i go the college bus 2. many students our college study well 3. leaving the college i can try to enter the university 4. our college trains specialists work different spheres

1. I go to the college by bus.
2. Many students from/of/in/ our college study well.
3. After  leaving the college I can try to enter the University.
4. Our college trains specialists for/to work in different spheres.