COMPLETE THE EXERCISE WITH IF OR UNLESS. 1. _______________ you drive more carefully, you will have an accident. 2. _______________ you prune these trees, they won’t grow well. 3. He’ll get lost _______________ someone shows him the way. 4. _______________ you practice your Russian, you can improve it quickly. 5. _______________ you don’t hurry, you’ll be late for school again. 6. _______________ there is oxygen, fire cannot burn. 7. _______________ you go to bed late, you’ll feel tired in the morning. 8. My parents will be angry _______________ I pass my exams. 9. You can’t travel abroad _______________ you don’t have a passport. 10. You can’t watch TV _______________ you finish your homework. 11. _______________ they lower the price, I won’t buy that computer. 1. We cannot go sailing _______________ the rain stops. 2. I won't talk to her _______________ she apologizes to me. 3. You won't be able to find the house _______________ you get help from your GPS. 4. I won't go _______________ he is going. 5. _______________ we don’t take the necessary measures now, we may have serious problems later. 6. _______________ you don't take notes you will have hard time studying later. 7. She must have graduated already, _______________ she failed a class. 8. Jason is always cheerful _______________ something really bad happens. 9. I will never forgive you _______________ you tell him the truth. 10. You are not allowed into the casino _______________ you are under 21 years old. 11. My mother will cook _______________ they decide to eat out. 12. I should be there by 11 o'clock _______________ I don't catch any traffic. 13. I should be there by 11 o'clock _______________ I catch a lot of traffic. 14. The show should start at 9:30 _______________ they changed the schedule.