Nguyen Ngoc Truong Son learnt to play chess by watching his parents in their home. His parents were surprised that Son understood how to play because little Truong Son was only three years old at the time. Although chess is a difficult game, a month later he beat his parents at their favorite game. At the age of four, Truong Son took part in the national young chess championship. Then at seven, he won a silver medal at the under-nine national chess championship. He was later chosen to take part in the world young chess championship in Spain in 2000. Now he is Vietnam’s youngest champion. Born in Mekong Delta of Vietnam, Truong Son is a great surprise to his parents. They are both teachers, earning less than US$ 100 a month, and cannot explain how their child can play so well. His father thinks that Son was perhaps born with the ability and he simply PICK YOU UP. 21. According to the passage, how did Nguyen Ngoc Truong Son learn to play chess? A. He was taught by his parents. B. He was taught by his teacher. C. He looked at his parents playing chess. D. He watched his friends playing chess. 22. When did Son take part in the national young chess championship? A. When he was four years old. B. When he was three years old. C. When he was seven years old. D. When he was nine years old. 23. Where was the 2000 World’s chess championship held? A. in Vietnam B. in China C. in Spain D. in England 24. How much do Son’s parents earn a month? A. less than one hundred dollars. B. More than one hundred dollars C. Less than two hundred dollars D. More than two hundred dollars 25. The word “picked it up” in the last sentence is closest in meaning to: A. learned it B. taught it C. enjoyed it D. earned it