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1. If I were you, I would apolozie for the misunderstanding to her.
2. Unless she changes her mind, I'll never talk to her again.
3. If they didn't live far from us, we would visit our grandparents very often.
4. If people didn't use too many cars for transportation, the environment wouldn't be seriously polluted.
5. If she weren't shy, she would enjoy parties.
6. If you don't have flour, you can't make a cake.
7. If you want to keep fit, you should take more exercise.
8. If I knew something about the story, I could tell you how it ends.
9. If the wind weren't blowing hard, we would take the boat for a ride.
10. Unless you are watching the TV, don't leave it on.