1)
If I do more work, I'll pass my exams.
If I pass my exams, I will go to universtity.
If I go to university, I will study medicine
If I study medicine, I will become a doctor.
If I become a doctor, I will earn a good salary
If I stop smoking, I'll have more money.
If I have more money, I'll save some every week.
If I save some every week, I'll be rich when I'm 30 (насчет этого на 100% не знаю)
If I'm rich when I'm 30, I will have my own business.
If I have my own business, I will make a lot of money.
If I make a lot of money, I'll retire when I'm 40