8. If I had the right change, we could get the ticket
9. If you don't study hard, you won't pass the exam
10. If you are impatient, you will make mistakes
11. If I were you, I wouldn't buy it
12. Unless they invite me, I won't come
13. If he had revised all his lessons, he wouldn't have failed the exam
14. If I were you, I would cut down on smoking right now
15. Unless you leave me alone, i will call the police
16. Should you arrive at the office earlier than I do, please turn on the air-conditioner
17. If it is snowy, the children don't go to school
18. Unless you tell me the whole truth, I won't help you
19. Were you to take good care of it, the car wouldn't break down
