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2 If you had turned off the cooker, a fire wouldn't have started.

3 If war hadn't broken out, lots of lives wouldn't have been lost.

4 If there were enough schools we could solve the problem of illiteracy.

5 When the new factory is opened, there will be 500 new jobs.

6 If the water were not polluted, it would be safe to drink.

7 If we had acted quickly, the fire wouldn't have spread.

8 If we had enough volunteers, we could clean the park.