Расскройте скобки в подходящем медли :1. If I don039;t pass the

Расскройте скобки в подходящем времени :
1. If I don't pass the exam ,I ... it again in January (do)
2. You'd sleep better if you .... less coffe (drink)
3. Don't buy it unless you ... sure you like it (be)
4. If I could change a part of my body , I ... my nose (change)
5. As soon as he ... , we can have dinner (arrive)
Заблаговременно спасибо )