Hoàn thành các câu sau, cho dạng đúng của động từ trong ngoặc. 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? 11. I’d be absolutely astonished if Mary and James (get) _____________ married. 12. They won’t let you in unless you (show) _____________them your identity card. 13. My best friend gave me this book. She (be) ________________ very upset if I lost it. 14. Would you mind if I (turn) ________________ up the radio. 15. I’m sure she (forgive) ______________ you if you sincerely apologize to her. giải thích