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3. I can sleep late tomorrow morning because I don't have to go to work. 4. Whatever you do, you mustn't touch that switch. It's very dangerous. 5. There's a lift in the building, so we don't have to climb the stairs. 6. You mustn't forget what I told you. It's very important. 7. Silvia doesn't have to get up early, but she usually does. 8. Don't make so much noise. We mustn't wake the children. 9. I mustn't eat too much. I'm supposed to be on a diet. 10. You don't have to be a good player to enjoy a game of tennis.