口語交際：Section B

　　A. Vitamin D is essential for the growth of bones and teeth and is found in fish, liver, oil and milk.

　　B. Where does it exist?

　　C. Could you cite an example?

　　D. They have different functions.

　　Interviewer: Good afternoon, welcome to Health Today. I’m Nora Brown. Today, our expert Doctor Gray will tell us something of vitamins. Doctor Gray, please.

　　Doctor Gray: Good Afternoon, everyone, I’m Vincent Gray.

　　Interviewer: Doctor Gray, how many vitamins are there in food?

　　Doctor Gray: Up to now, about fifty different vitamins have been identified. But only a few of them are familiar to people.

　　Interviewer: (1)_______

　　Doctor Gray: Well, do you know Vitamin A?

　　Interviewer: Yes. It is said Vitamin A is most important for good eyesight.

　　Doctor Gray: Right, but it is also important for general good health.

　　Interviewer: (2)_______

　　Doctor Gray: Liver contains a considerable amount of vitamin A, but vitamin A is also found in fish, meat, milk, butter and so on.

　　Interviewer: Apart from Vitamin A, we know Vitamin B, C and D. Are they as important as Vitamin A?

　　Doctor Gray: (3)______ Vitamin B consists of twelve different chemicals, which are found in eggs, cheese, and vegetables. If a person has an inadequate amount of vitamin B in his diet, this may affect his whole body, particularly the skin, the nervous system and the heart. Vitamin C helps to heal injuries. Large quantities of vitamin C help people to avoid colds. Fruits and uncooked vegetables are rich in vitamin C, but when they are overcooked, or left for a long time, they lose most of their vitamins.

　　Interviewer: And what about Vitamin D?

　　Doctor Gray: (4)___________ Vitamin D is the only vitamin that the body can make for itself, but it can only do this if there is sufficient sunlight. A lack of both sunlight and vitamin D can result in a disease called rickets, which causes bones to soften and to be deformed.

　　Interviewer: So we should enjoy both Vitamin D and sunlight.

　　Doctor Gray: Actually, a well-balanced diet will provide an adequate amount of vitamins.

　　參考答案：

　　1.C 2. B 3. D 4. A