阅读理解。 A young man is lying in hospital sadly. The 24-year-old lost his right leg. The doctor said that his long history of smoking (吸烟) was the reason. 'I first smoked when I was 14. It made me feel like a man and I thought it looked cool. Now I know I was wrong,' said the young man. It is a mistake (错误) many young people make. According to the survey, 40 million (百万) of China's 130 million young people aged between 13 and 18 smoke. Fifteen million of them are addicted (上瘾的).The survey also found that about 68% of young smokers first smoked before the age of 13. Many young people see people smoke in the movies, but in real life, stars like Jackie Chan think smoking is a bad thing and not cool at all. Doctors say that if a person starts smoking very young, he or she may live 22 years less than those who don't smoke. 1. How long did the young man smoke? A. For 10 years. B. For 13 years. C. For 14 years. D. For 18 years. 2. What did the young man think of smoking when he first smoked? A. It was wrong. B. It was bad. C. It was boring. D. It was cool. 3. What does the underlined word 'it' refer to (指的是)? A. Smoking. B. Getting ill. C. Lying in hospital. D. Stopping smoking. 4. The number of young people who smoke in China is ____ million. A. 15 B. 40 C. 68 D. 130 5. What can we learn from the passage? A. Many stars think smoking is cool. B. People who smoke can only live to be 22. C. It's a big problem that many young people smoke. D. Many young smokers first smoked before the age of 10.