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I have attended many competitions in different phases of my life and have won some prizes from those competitions as well. One such contest that I would like to talk about was the Cycling competition that I participated in my college. I was then a student of the college and around 15 years old. One day I noticed an advertisement in our local newspaper that an inter-college cycling competition would be held on next week. The entry fee would be 20.000 VND and the prizes would be given to the first three cyclers. I had a passion for cycling and that’s why I thought to participate it. On the day of the contest, I went to the starting point and registered my name in the competition. I took my bicycle and wore my cycling dresse. I noticed there were around 30 competitors and I was asked to stand at my start point. With the sound of the whistle, I start cycling. I had almost no intention of winning prized but I simply did concentrate on cycling. The total distance was around 1 kilometers. After I finished the racing, I was really surprised to hear that I won the third prize. Some of my classmates were shouting because I was one of the three prize winners. I felt really happy and proud that I did well in this competition. Actually, I never took my cycling habit seriously but I did well in that competition. So after that I started practicing and participating in other cycling competitions as well.
52. for who => for whom
Giải thích : Sau "for" là giới từ chỉ được đi với whom : thay cho người là túc từ
Mà "the children" là danh từ nói về người nên dùng "whom"
53. is => was
Bởi vì trong câu có từ last night đi với thì quá khứ đơn
54. extincted => extinct
55. Greatly => great
56. pollution => pollutants [ tham khảo]
37 D industrialized: Trong câu này cần động từ ở dạng quá khứ phân từ để mô tả việc các quốc gia đã trở thành công nghiệp hóa. Vì vậy, đáp án là "industrialized".
38 A burning: Từ "burning" có nghĩa là đốt cháy, phù hợp với ngữ cảnh của câu.
39 B on: "Contribute on" là cụm động từ chính xác để diễn tả việc đóng góp cho một điều gì đó.
40 C run: "Run out" có nghĩa là cạn kiệt, hết, phù hợp với ngữ cảnh của câu.
41 D non: "Non-polluting" có nghĩa là không gây ô nhiễm, phù hợp với ngữ cảnh của câu.