1. We don’t have enough money, so we can’t buy that house. A. If we had enough money, we could buy that house. B. We could buy that house if we have enough money. C. If we had had enough money, we could buy that house. D. We could have bought that house if we had had enough money. 2.Water these plant or they will die A.Unless you water these plants ,they will die B.Unless you watered these plants ,they will die C. Unless you water these plants ,they won’t die D. If you water these plants ,they will die 3. Hurry up or we’ll be late for the correct A. If we don’t hurry , we won’t be late for the concert B.If we didn’t hurry , we will be late for the concert C. If we don’t hurry, we will be late for the concert D.Unless we don’t hurry, we will be late for the concert 4..I can’t do this test because it is very difficult A.If this test were difficult,I could do it B. If this test weren’t difficult ,I could do it C.If this test weren’t difficult,I couldn’t do it D.Unless this test were difficult, I couldn’t do it 5. Study harder or you won’t pass the exam. A. Only if you study harder, you will fail the exam. B. Unless you study harder, you will pass the exam. C. If you don’t study harder, you will fail the exam.D. If you don’t pass the exam, you will have to study harder. 6. Take action soon or the pollution will get much worse. A. If you don’t take action soon, the pollution will get much worse. B. Unless you don’t take action soon, the pollution will get much worse. C. The pollution will get much worse if you didn’t take action soon. D. Only if you take action soon, the pollution will get much worse. 7. The fire will go out if we don’t put more wood on. A. If we don’t put more wood on, the fire won’t go out. B. Unless we put more wood on, the fire will go out. C. The fire will go out, so we don’t put more wood on. D. Unless we put more wood on, the fire won’t go out. 8. They spent a lot of money on food and clothes. A. A lot of money was spent on food and clothes. B. A lot of money were spent on food and clothes. C. A lot of money on food and clothes were spent. D. A lot of money on food and clothes was spent. 9. People have used the Internet all over the world. A. The Internet has used all over the world. B. The Internet was used all over the world. C. The Internet has been used all over the world. D. The Internet has been using all over the world. 10. Our house is going to be rebuilt by a local firm. A. We are going to rebuild our house. B. We are going to have our house to rebuild. C. A local firm are going to rebuild our house. D. A local firm is going to rebuild our house.