Chose the correct option.
1. I like to take it easy after / unless I finish football training.
2. Sarah gets into trouble when / unless she skips lessons.
3. I'll pay tuition fees if/ before you promise to work hard.
4. As soon as/ unless I pass this exam I'm going to start revising for the next one.
5. Jan won't get good grades if/ unless he learns how to cope with exam stress.
6. You should always arrive at least fifteen minutes before / when an important exam.