Wstaw brakujące przyimki w zdaniach.

A farmer works --- on in at a farm.

A teacher works --- on in at a school.

A student studies --- on in at a university.

A shop assistant works --- on in at a shopping centre.

A worker works --- on in at a factory.

Ale:

I am a student. I am --- on in at school today.

I am a professor. I am --- on in at university now.