Choose the correct option: if, in case, or unless.

1. Bring your umbrella _____ it rains.

2. _____ you wash the dishes, you won’t go out.

3. I bought a bottle of wine _____ she comes.

4. _____ you study, you will pass the test.

5. _____ there’s a surprise quiz tomorrow, I will study.

6. You won’t be able to go on vacation with us _____ you save money.

7. _____ you study, you won’t pass the test.

8. _____ you study, you may pass the test.