Cho tam giác ABC vuông tại A đường cao AH,Kẻ HE vuông góc AB, HF vuông góc AC Chứng minh tứ giác BEFC nội tiếp

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I. Choose the best answer to complete the conditional type 1 sentences. 1. If the sun shines today, we _____for a walk. A. will go B. go C. would go D. had gone 2. We ‘ll get wet if we ………….out. A. go B. did go C. went D. had gone. 3. If I go shopping, I ………some food. A. buy B. will buy C. would buy D. would have bought. 4. If I find it, I ………you. A. will tell B. would tell C. had told D. told. 5. You will get a good seat if you _____ first. A. come B. came C. have come D. will come 6. If you cook that kind of food, we _____ it. A. don’t eat B. won’t eat C. wouldn’t eat D. didn’t eat 7. If she _______you, she will tell you the truth. A. will meet B. met C. meets D. would meet 8. She _________out virus covid 19 if she is isolated in a place. A. spreads B. didn’t spread C. will spread D. won’t spread 9*. Sam will phone you_________________________. A. if he doesn’t arrive home B. as soon as he arrives home C. unless he doesn’t arrive home D. when he arrived home. 10*. You won’t pass the examination……………you study more. A. as long as B. unless C. if D. whether. II. Choose the best answer to complete the conditional type 2 sentences. 1. What would happen if you _________to work tomorrow? A. don’t go B. didn’t go C. won’t go D. wouldn’t go. 2. If someone _________in here with a gun, I would be very frightened. A. would walk B. walks C. had walked D. walked. 3. If I were offered the job, I think I _________ it. A. take B. will take C. would take D. would have taken. 4. I would be very surprised if he _________ A. refuses B. refused C. had refused D. would refuse. 5. Many people would be out of work if that factory _________down. A. closes B. had closed C. closed D. would close. 6. If she sold her car, she _________ much money. A. gets B. would get C. will get D. would have got. 7. Would John be angry if I _________his bicycle without asking? A. take B. took C. had taken D. would take. 8. She _________terrible upset if I lost this ring. A. will be B. would be C. were D. had been. 9. They would be disappointed if we _________ A. hadn’t come B. wouldn’t come C. don’t come D. didn’t come. 10. If we didn’t miss the 6: 30 train, we _________home on time. A. would have arrived B. arrived C. will arrived D. would arrive.