1. We (be) ___ _________ happy if air pollution were the only problem. 2. They would be disappointed if you (not go) _____ ________ to their party. 3. If we (use) ___ ____ this kind of light bulb, we can save energy. 4. Peter should go to sleep early if he (not want) ____ ________ to be tired the next morning. 5. If you (take) _______ _______ more exercises, you would be more resistant to diseases. 6. You may have car accident unless you (drive) _______ ________ more carefully. 7. If I travel to London, I (visit) ____ ________ its museum. 8. If they offer me the job, I think I (accept) _______ __________ it. 9.Many people (be) ______ ______ out of work if the local factory closed down. 10. What (happen) ______ ___________ if that red button was pressed?