8. If I had the right change, we would get the ticket
9. If you study hard, you will pass the exam
10. If you are impatient, you won't make mistake
11. If I had eaten lunch, I wouldn't feel hungry now
12. If it had rained, we would have had a better crop
13. If I were you, I wouldn't buy it
14. If they don't invite me, I won't come
15. If he had revised all his lesson, he wouldn't have failed the exam
16. If you didn't leave me alone, I wouldn't call the police
17. If you arived at the office earlier, you could turn on the air- conditioner
18. If the weather wasn't too bad, the children would go to school
20. If you didn't tell me the whole truth, I wouldn't help you