Fill in the gaps with unless, if, when

1. I wouldn't ride my bike without a helmet
   [ ] I were you.
2. [ ] it rains, we will go see the sights.
3. Sara is always late
   [ ] she walks to work.
4. [ ] the weather gets colder, the leaves fall from the trees.
5. [ ] she exercised more, she would be healthier.
6. We aren't allowed to go to the cinema
   [ ] we clean our rooms.