(Can, may, must) you play the piano? 2. (Can, may, should) I watch TV before going to bed? 3. I am sure I (can, may,

1. Can you play the piano? 2. May I watch TV before going to bed? 3. I am sure I can do the work myself. 4. Mary must finish the work at once. 5. Can you start working immediately? 6. I am to come to the examination at 9 o’clock. 7. May I trouble you for a glass of water? 8. He has to learn English. 9. You must follow my advice. There is no way out for you. 10. May I have a look at your painting? 11. Can you play the piano? 12. You may stay a little longer if you like. 13. I can\'t hear you. Speak louder. 14. You must return this book to the library. We all need it. 15. We have to meet each other at the station.