2. Unless she changes her mind, I'll never talk to her again.

3. If our grandparents didn't live far from us, we would visit them often.

4. If people didn't use too many cars for transportation, the enviroment wouldn't be seriously pollutued.

5. If she weren't shy, she would enjoy parties.

6. If you don't have any flour, you can't make a cake. 

7. If you take more exercises, you can keep fit.

8. If you don't know anything about the story, I can't 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 TV, don't leave the TV on.

2.Unless she changes her mind,I'll never talk to her again.

3.If our grandparetns didn't live far from us,we would vivit them very often.

4.If people didn't use too many cars for transportation,the enviroment wouldn't be seriously polluted.

5.If she weren't shy,she would enjoy the 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 exercises.

8.If I knew something about the story,I could tell you how it ends.

9.If the wind were blowing hard,we would take the boat for a ride.

10.Unless you are watching TV,don't leave it on.