阅读理解。 BEIJING, May 11-The first ease of A/H1N1 influenza (甲型流感) was confirmed (确认) on the mainland. The man returned from the United States. The 30-year-old patient was at the hospital in Chengdu, Sichuan's provincial capital. LHASA. Oct. 4-China has reported its fast death of A/H1N1 influenza. The18-year-old girl was taken to the hospital on Saturday for coughing, sore throat and muscular stiffness. Her body temperature was as high as 40 degrees. China is experiencing what experts called 'a second round of A/HIN1 flu infection (感染), 'because recent infections are increasing quickly. More than 300,000 people have been given the vaccine (疫苗) by Oct. 10. But all the vaccines were not on the market. What can I do to protect myself from catching influenza A (H1N1)? First, don't touch your mouth and nose. Second, clean hands with soap and water. Third, don't be close to people who might be ill. Fourth, spend less time in crowded places if possible. Fifth, open the windows and doors to let the fresh air in. Sixth, practice good habits such as eating healthy food and keeping doing sports. Seventh, wear a mask if necessary. 1. Where did the first case of A/H1N1 influenza happened on the mainland? [     ] A. Chengdu. B. Beijing. C. Shanghai. D. Lhasa. 2. When did China report its first death of A/H1N1 influenza? [     ] A. May 11. B. Oct. 4. C. Oct. 10. D. Oct. 31. 3. How many ways are there in the passage to protect ourselves from catching H1N1? [     ] A. 4. B. 6. C. 7. D. 10. 4. Why do we say China is experiencing 'a second round of A/H1N1 flu infection'? [     ] A. Because all the vaccines were not on the market. B. Because more than 300,000 people have been given the vaccine by Oct. 10. C. Because the experts said so. D. Because infections are increasing quickly. 5. Which of the following is not right? [     ] A. The first patient returned from the United States. B. The body temperature of the first death wasn't high. C. Don't be close to people who might be ill. D. The first death of A/H1N1 influenza was in Lhasa.