The correct answer
1. If Peter drinks too much beer, he'll get drunk.|he will get drunk.
2. If he gets drunk, he'll have a headache.|If he gets drunk, he will have a headache.
3. If he has a headache, he will not go to work.|If he has a headache, he won't go to work.|If he has a headache, he can not go to work.|If he has a headache, he can't go to work.
4. If he doesn't go to work, he'll make his boss angry.|If he doesn't go to work, he will make his boss angry.|If he does not go to work, he'll make his boss angry.|If he does not go to work, he will make his boss angry.
5. If his boss gets angry, he'll lose his job.|If his boss gets angry, he will lose his job.
6. If he loses his job, he'll have no money.|If he loses his job, he will have no money.
7. If he has no money, he'll have no beer to drink.|If he has no money, he will have no beer to drink.