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If I study better, I will pass the exams. (First Conditional, probable future)

If I studied better, I would pass the exams. (Second Conditional, imaginary unlikely situation)

If I had studied better, I would have passed the exams. (Third Conditional, regret about the past)

1. People must be careful when driving. If anyone [ ] when driving a car, they can [ ] into a car accident.

2. I'm not going to school at the moment because of a broken leg. If I [ ] the seatbelt, I [ ] my leg.

3. I think that if I [ ] a car, I [ ] the seatbelt.

4. If Megan [ ] me with the essay tomorrow, I [ ] you at Bill's party.

5. Kelly and I have been married for five years now. If I [ ] to that Christmas party, I [ ] my lovely wife.

6. If I [ ] you, I [ ] to the parties to meet someone.

7. I'd like to ask for a promotion. If my salary [ ] bigger, I [ ] abroad each year.

8. When one [ ], they [ ] a lot about nature and other countries' customs.

9. If my salary in my previous company [ ] bigger, I [ ] abroad each year.

10. I [ ]
    in BigFoot only when I [ ] it.

11. I know he is a bigmouth. I [ ] him unless I [ ] a photo.

12. I [ ] only if I [ ] a photo of BigFoot!