Choose best option. (can, cannot, must, mustn't, should, shouldn't, have to, may)
1. Sorry, you___smoke inside this room.
2. You___go to that restaurant. It’s not very good.
3. After you finish the test, you___leave if you want to.
4. You___show your passport at the check-in-desk.
5. They___go swimming today because the pool is closed!
6. I think you___see a doctor if you are ill.
7. Drivers___start their journey early.
8. Young children___ watch the film.
9. You___walk on the grass.
10. Students___buy cheap fares here.