Choose the correct answer (if or unless)

1. If Unless you help me, I'll be unable to do it .
2. If Unless I meet him, I'll tell him the whole truth.
3. You won't get well if unless you stop smoking.
4. If Unless you exercise regularly, you won't be able to lose some weight.
5. If Unless you exercise regularly, you'll lose some weight.
6. The teacher will be furious if unless you don't the homework.
7. You can't go on vacation if unless you don't save some money.
8. You will feel cold if unless you wear a warm jacket.
9. We'll arrive on time if unless we hurry.
10. Don't call me if unless it's an emergency.