1. Get in touch with me as soon as possible if you change your mind about the trip. A. Should you change your mind about the trip, contact me as soon as possible B. If you changed your mind about the trip, get in touch with me as soon as possible. C. You should call me whenever you changed your mind about the trip. D. Having changed your mind about the trip, you should get in touch with me soon 2. Without his help, we would all die. A. We died because he didn’t help us. B. He didn’t help us, so we died. C. If it hadn’t been for his help, we would all have died D. If he had helped us, we wouldn’t have died. 3. You can stay in the flat for free if you pay the bills. A. Provided you pay the bills, you can stay in the flat for free. B. Without the bills paid, you can stay in the free flat. C. Unless the flat is free of bills, you cannot stay in it. D. Whether you pay the bills or stay in the flat, it is free. 4. In my experiments, the liquid is cooled to 32¬¬¬ºF. It always freezes. A. If you cool the liquid to 32 degrees, it froze. B. If you cooled the liquid to 32 degrees, it would freeze. C. If you cool the liquid to 32 degrees, it will freeze. D. If you had cooled the liquid to 32 degrees, it would have frozen. 5. If he doesn’t apologize, I will never invite him here again. A. Unless he apologizes, then I will never invite him here again. B. Unless he apologizes, or I will never invite him here again. C. Unless he doesn’t apologize, I will never invite him here again. D. Unless he apologizes, I will never invite him here again. 6. Do your homework first and I’ll let you play the computer games. A. I won’t allow you to do homework when you play the computer games. B. Let’s play the computer games without doing your homework. C. You are allowed to play the computer games without doing your homework. D. Unless you do homework first, I won’t let you play the computer games. 7. I don’t have enough money with me now; otherwise I would buy that coat. A. If I didn’t have money with me now, I would buy that coat. B. If I had money with me now, I would buy that coat. C. If I had money with me now, I wouldn’t buy that house. D. If I didn’t have money with me now, I wouldn’t buy that house. 8. Susan regretted not buying that villa. A. Susan wished she had bought that villa. B. Susan wished she bought that villa. C. Susan wished she could buy that villa. D. Susan wished she hadn’t bought that villa. 9. It’s a pity that you didn’t tell us about this. A. I wish you told us about this. B. I wish you would tell us about this. C. I wish you had told us about this. D. I wish you have told us about this. 10. I’m afraid he will not get over his illness. A. I wish he will get over his illness. B. I wish he would get over his illness. C. I wish he got over his illness. D. I wish he had got over his illness. 11. Peter regretted buying the secondhand computer. A. Peter didn’t want to buy the secondhand computer. B. Peter wished he didn’t buy the secondhand computer. C. Peter wished he hadn’t bought the secondhand computer. D. Peter was glad to buy the secondhand computer. 12. I regret that you didn’t give me a chance to tell you the truth. A. I wish you didn’t give me a chance to tell you the truth. B. I wish you gave me a chance to tell you the truth. C. I wish you had given me a chance to tell you the truth. D. I wish you hadn’t given me a chance to tell you the truth.