IV- Choose the best answer which has the same meaning with the given one. 1 If there isn’t enough rain, the hydropower station can not operate. A. When there isn’t enough rain, the hydropower station can operate. B. Unless there is enough rain, the hydropower station can operate. C. Unless there isn’t enough rain, the hydropower station can not operate. D. Unless there is enough rain, the hydropower station can’t operate. 3. If we don’t save water, we will have to suffer fromn water shortage. A. Unless we don’t save water, we will have to suffer from water shortage. B. If we save water, we will have to suffer from water shortage C. Unless we don’t save water, we won’t have to suffer from water shortage D. If we save water, we won’t have to suffer from water shortage. 4. She is too weak; she can’t sit up and talk to you. A. If she wasn’t too weak, she could sit up and talk to you. B. If she hadn’t been too weak, she could sit up and talk to you C. If she isn’t too weak, she can sit up and talk to you D. If she wasn’t too weak, she can sit up and talk to you 5. I am too old now; otherwive, I will apply for that post. A. If I would not be too old, I would apply for that job. B. If I was not be too old, I will apply for that job. C. If I were not too old, I would apply for that job. D. If I am not too old, I will apply for that job. 6. I didn’t have enough money with me then; otherwise I wouldn’tl buy that coat. A. If I didn’t have enough money with me then, I would buy that coat. B. If I had had enough money with me then, I would have bought that coat. C. If I had enough money with me then, I wouldn’t buy that coat. D. If I didn’t have enough money with me then, I wouldn’t buy that coat. It’s raining and they can’t go camping in the mountain. A. If it was raining, they could go camping in the mountain. B. If it isn’t raining, they could go camping in the mountain. C. If it wasn’t raining, they could go camping in the mountain. D. If it is raining, they could go camping in the mountain. 41) We_____ you if we have time. A. will phone B. would phone C. phoned D. had phoned 42) It_____ be a pity if she married Fred. A. will B. would C. can D. may 43) If I’m free on Saturday, I_____ to the mountains. A. to go B. could go C. went D. can go 44) She_____ a nervous breakdown if she goes on like this. A. will has B. had C. will have D. have 45) I know I’ll feel better if I_____ smoking. A. will stop B. stopped C. stop D. had stopped 46) If I_____ you, I would help him. A. am B. were C. will be D. had been 47) I could have understood him if he_____ more slowly. A. speaks B. spoke C. had spoken D. would speak 48) He didn’t listen to the teacher. If he_____ carefully, he_____ well in the examination. A. listens / will performed B. listened / would perform C. had listened / would have performed D. had listened / had performed 49) He’s waiting for his mother to come back from Chicago. If his mother_____ home, he_____ a lot of presents. A. come / will has B. comes / will have C. will come / has D. came / had