Написать 5 предложений с If

1. I usually make a sandwich to take to work if I have enough time. 2. If you don't book now, you won't get good tickets. 3. I'll pay you double if you get the work finished by Friday. 4. If anyone calls, just say I'll be back in the office at four o'clock. 5. You have to go to college for a lot of years if you want to be a doctor.