Please correct my conditional sentences

1. If they hadn't laid (passed ??? their) exam, their teacher would have been sad.
2. If you don't take an umbrella, you will get wet.
3. I would wake (tell??) you the answer if knew it.
4. If he woke up earlier, he would be able to do a lot more things.
5. If I have (or ate??) any more food, I will (would) be sick.   [I am not sure whether this is what you meant here... ]
6. If I pass my driving test, I will take my girlfriend out to celebrate.
7. If you didn't (don't) have a driving (driver's) licence, you can't drive a car.
8. Sarah will be very disappointed if her boyfriend forgets her birthday again.
9. If they paid me a good salary, I would do that job.
10. If you don't listen to my advice, you will get into trouble.
11. If she listens to her coach, she will win.
12. If she had won the lottery, I would have bought a house.
13. If she could speak a foreign language, she (would find) found a better job.
14. If she had (had had) enough money, I would have gone to London.
15. If he had played a little better, we would have won the game.
16. If you had driven more carefully, you would have had an accident.
17. If I had time, I would study English.
18. We could have gone skiing, if it snowed.

Please correct my conditional sentences

1. If they hadn't set an exam, their teacher would have been sad.
2. If you don't take an umbrella, you will get wet.
3. I would tell/give you the answer if knew it.
4. If he woke up earlier, he would be able to do a lot more things.
5. If I eat any more food, I will be sick.
6. If I pass my driving test, I will take my girlfriend out to celebrate.
7. If you don't have a driving licence, you can't drive a car.
8. Sarah will be very disappointed if her boyfriend forgets her birthday again.
9. If they paid me a good salary, I would do that job.
10. If you don't listen to my advice, you will get into trouble.
11. If she listens to her coach, she will win.
12. If I had won the lottery, I would have bought a house.
13. If she could speak a foreign language, she could find a better job.
14. If I had enough money, I would have gone to London.
15. If we played a little better, we could have won the game.
16. If you had driven more carefully, you would not have had an accident.
17. If I had time, I would study English.
18. We could have gone skiing if it had snowed.