11. If you do not like this one, I'll bring you another. → Unless ......................................................................................................................................................... 12. Martin failed his driving test last week because he was very nervous. → But for......................................................................................................................................................... 13. He will pay me tonight; I will have enough money to buy a car. → If ................................................................................................................................................................ 14. Leave me alone or I'll call the police. → If ................................................................................................................................................................ 15. If you arrive at the office earlier than I do, please turn on the air-conditioner. → Should......................................................................................................................................................... 16. He died so young; otherwise, he would be a famous musician by now. → Had it .......................................................................................................................................................... 17. The car breaks down so often because you don't take good care of it. → Were you ................................................................................................................................................... 18. Don’t tell lies to your boss or you'll be fired at once. → If ................................................................................................................................................................. 19. He didn't revise all his lessons, so he failed the exam. → Had ........................................................................................................................................................... 20. Rita is exhausted today because she didn't get any sleep last night. → If .................................................................................................................................................................