阅读理解。 Mary is reading something about how to keep healthy on the Internet. Good sleep is important for your health. You need about eight hours’ sleep a night. Don’t eat or read in bed. A cup of milk before sleeping may help you get a good sleep. Go to bed before 10:00 and get up early every morning. For more information, please visit www. sleeping. com . How often do you exercise? If you want to stay healthy, you should do a lot of exercise. Try to exercise for 30 minutes a day, three or four times a week. For more information, please call Health Line at 180-2000. Studies show that the cold or flu virus(流感病毒) can live on our hands for long. So you should wash your hands often with soap and water. If you want to know more, please call Health Line at 180-1313. Brush your teeth twice a day. And see a dentist at least (至少) once a year. The oral examination (口腔检查) is not only for the health of teeth, but the whole body. Please visit www. mydr. com for more information. 1. If you want to get a good sleep, you should before sleeping. A. stay up B. read in bed C. drink some milk D. eat something 2. You should do exercise to keep healthy. A. many hours every day B. ten minutes every day C. 30 minutes a week D. about 2 hours a week 3. To prevent from catching a cold or flu, it’s good for you . A. to wash your hands often B. to brush your teeth twice a day C. to get up early every morning D. to eat some healthy food 4. You should visit the dentist at least once a year, because . A. you don’t often brush your teeth B. the oral examination is necessary C. it is good for the dentists D. it can only keep your teeth healthy 5. If you want to learn more about flu, you can . A. visit www. sleeping. com. B. call Health Line at 180-2000 C. call Health Line at 180-1313 D. visit www. mydr . com