Rewrite these sentences

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1. If you are absent from school, you have to write a sick-note.
2. Unless ............................................
3. If my sister didn’t have a terrible headache she wouldn’t be absent from her class.
4. Unless ............................................
5. Unless he refused everything, he would lose his family.
6. Unless I saved my money, someone would take it.
7. Unless you had stayed at home yesterday, you wouldn’t have enjoyed a delicious meal.
8. If .................................................
9. Unless he had been busy last night, he could have met his friends.
10. If ..................................................
11. If she hadn’t missed the bus, she wouldn’t have been late.
12. Unless ..............................................
13. Unless you lived in the dormitory, you could annoy me.
14. Unless the student goes to school early, he will be punished.