6. Correct the mis-collocations in these sentences:
1. I can’t come out. I’m studying. I’m passing an examination tomorrow.
2. She’s a professor in a primary school.
3. I’m happy to say that you have all taken your maths test.
4. It isn’t compulsory to visit all the lectures at this university.
5. Our professor made a very interesting lecture on the history of Russian painting.
6. I always do notes in the lectures.