---How did you do on the test?

---Not so well. I ______much better, but I misread the directions for Part One.

　 A. could do　　　 B. could have done　　　 　　 C. must have done　　　 D. should do

When it comes to your skin, there is an extremely important fact that you must keep in mind: Your skin is the largest organ of your body. As an obvious result, skin health and maintenance(保养) is vital. Your skin does everything from protecting you from the elements to assisting you with breathing. Your skin keeps your body hydrated(含水的) and regulates your body's temperature. In the end, this really is only the beginning of all of the various vital functions that your skin provides to you.

Despite the extreme importance of a person's skin, the reality is that many people simply do not pay much attention to issues relating to the health of their skin. With that in mind, there are some prime tips and pointers that you must always keep in mind when it comes to the health and protection of your skin.

Protection against harmful rays from the sun is one of the most important steps that you need to take. With this in mind it is vitally important that you make certain you use solid protection when you go out into the sun.

Your diet also has a direct effect on the health of your skin. The most important aspect of your diet in relation to the health of your skin is to make certain that you eat a proper amount of food items that contain the proteins and nutrients necessary for cellular maintenance, repair and regeneration(再生). With this in mind, your skin cells actually rely on a sufficient amount of carbohydrates.

Water is also important to the Health of your skin. While you certainly have heard it before, it actually is true that you should drink at least eight 8-ounce glasses of fresh and pure water every day. There are many health benefits you can get from drinking water daily, including maintaining healthy skin.

Finally, when it comes to the health of your skin today and into the future you should avoid smoking all together. In addition, you should drink alcohol only in moderation. Both smoking and too much alcohol consumption can negatively affect the health of your skin in significant ways.

1．The underlined word elements in the first paragraph probably refers to _______.

　 A. bad weather　　　　　　　　　　　　　　　　　　　　 B. a favorable environment

　 C. all the chemicals　　　　　　　　　　　　　　　　　 D. the cells making up the skin

2．The writer lists some of the functions of skin in the beginning part to _______.

　 A. make an analysis of the main topic of the passage

　 B. draw readers’ attention to the main topic of the passage　

　 C. give a brief introduction to the main topic of the passage

　 D. give the readers a summary of the main topic of the passage

3．Which of the following does not help maintain the health of skin?

　 A. Drinking alcohol in moderation.

　 B. Including adequate carbohydrates in diet.

　 C. Using solid protection when exposed to the sun.

　 D. Drinking enough fresh and pure water every day.

4．The most suitable title of the passage may be _______.

　 A. An essential organ of our body　　　　　　　 B. Tips for soft and smooth skin

C. Habits and skin health D. How to keep our skin healthy

　 Is there anything more important than health? I don’t think so. “Health is the greatest wealth. ” wise people say. You can’t be good at your studies or work well when you are ill. If you have a headache, toothache, backache, earache or bad pain in the stomach, if you complain of a bad cough, if you run a high temperature and have a bad cold, or if you suffer from high or low blood pressure, I think you should go to the doctor. The doctor will examine your throat, feel your pulse, test your blood pressure, take your temperature, sound your heart and lungs, test your eyes, check your teeth or have your chest X-rayed. After that he will advise some treatment, or some medicine. The only thing you have to do is to follow his advice.

　 Speaking about doctor’s advice, I can’t help telling you a funny story. An old gentleman came to see the doctor. The man was very ill. He told the doctor about his weakness, memory loss and serious problems with his heart and lungs. The doctor examined him and said there was no medicine for his disease. He told his patient to go to a quiet place for a month and have a good rest. He also advised him to eat a lot of meat, drink two glasses of red wine every day and take long walks. In other words, the doctor advised him to follow the rule: “Eat at pleasure, drink with measure and enjoy life as it is. ” The doctor also said that if the man wanted to be well again, he shouldn’t smoke more than one cigarette a day. A month later the gentleman came into the doctor’s office. He looked cheerful and happy. He thanked the doctor and said that he had never felt a healthier man. “But you know, doctor, ” he said, “it’s not easy to begin smoking at my age.”