Rewrite the sentences below without changing their meaning. 1. Stop talking or you won’t understand the lesson. 2. Don’t touch that wire or you may get an electric shock. 3. If you don’t leave me alone, I’ll call the police. 4. Don’t tell lies to your boss or you’ll be fired at once. 5. Unless Seema submits the assignment today, she will loose her marks. 6. I will join you, unless I am working on Sunday. 7. Unless we curb poverty, we will be a poor nation. 8. Don’t chew gum in the class. 9. It isn’t necessary for you to do all the exercises. 10. I strongly advise you to take part in the meeting. 11. It’s important not to write anything on the walls 12. It’s important for students not to use their mobile phones during the lessons. 13. It’s important to arrive on time for lessons. 14. It’s important for students and teachers to be polite to each other. 15. It isn’t necessary for you to buy a coursebook because your teacher will give you one. 16. Don’t eat or drink in any of the classrooms. 17. It’s necessary for students to take an exam at the end of the year. 18. It is unnecessary for you to come. 19. Eating chewing-gum in the class is prohibited. 20. There was an obligation to turn off the mobile phone.