giúp mình với a 1. Unless the weather starts improving soon, the farmers will lose their crops. -> If the weather 2. Why don’t you take an advanced maths course? -> If I 3. Unless you have an emergency, you must attend class. -> If 4. Don’t be late for school, or the teacher will get angry. -> If 5. You can’t travel on this train unless you have a reservation. -> If you 6. I can’t send you email because I don’t have a computer. -> If I 7. Why don’t you join the local sport club? -> If I 8. Your letter won’t be delivered unless it has the correct postage. -> If your letter 9. I don’t wake up unless the alarm clock rings. -> If 10. She doesn’t feel happy unless she goes out with her close friends. -> If she