6. I can speak Arabic. a) expressing possibility B) expressing obligation c) expressing ability 7. I think you should see a doctor. a) expressing probability b) giving advice c) making a request 8. You must stop when the traffic lights are red. a) expressing prohibition B) expressing obligation c) expressing ability 9. You needn't take your umbrella. It isn't raining. a) expressing prohibition B) expressing obligation c) expressing lack of necessity 10. You may pass the exam. It is not very difficult. You only have to work harder.askin permission. a) expressing prohibition B) expressing obligation c) expressing possibility SMOKING​