Choose the correct forms.
1You can't / don't have to smoke in this area.
2People working in hospitals have to / can wear uniforms.
3You mustn't / don't have to finish the food if you don't like it.
4We must / can finish the work today. The boss won't wait!
5You mustn't / must wait here. Please move to the waiting room.
6You don't need to / mustn't tell him. He already knows.