[Grammar] I study English vs I'm studying English

[angelene001]

Which one is correct:
1. I'm a student. I study English at a university.
or
2. I'm a student. I'm studying English at a university.

And:
3. I'm a student at a university in London.
or
4. I'm a student on a university in London.
or
5. I'm a student in a university in London.

 

[Rover_KE]

Which one is correct:
1. I'm a student. I study English at a university.:tick:
or
2. I'm a student. I'm studying English at a university.:tick:

And:
3. I'm a student at a university in London.:tick:
or
4. I'm a student on a university in London.:cross:
or
5. I'm a student in a university in London. Possible, but not as good as 'at'.

Rover