Our body can make some vitamins（維生素）. When sunlight shines on the skin（皮膚）, the body produces Vitamin D. Some vitamins cannot be made or stored in the body. Vitamin C is an example. If a person doesn't take in any Vitamin C for a long time, a deficiency（缺乏）can develop in the body.

　　Vitamins are now added to many foods so that people take in more vitamins. For example, Vitamin D is added to milk. Because of rich foods, today deficiency diseases are not as common as they once were.

　　Many people also take vitamin pills. Most vitamin pills contain（包含）man-made vitamins, which are made in labs. Natural vitamins are found in foods. The vitamins that are added to natural foods are also man-made.

　　In the future, scientists may discover several new vitamins. New uses may also be discovered for the known vitamins. Scientists are experimenting to find out if vitamins can cure（治愈）or prevent diseases like cancer and heart disease. It may be that vitamins are even more important than we think.

(1)Our body can make some vitamins if _____________.

[　　]

A．we take much exercise

B．the sun shines on our skin

C．we eat much rich food

D．all of the above

(2)Eating enough food full of Vitamin C can make us ____________.

[　　]

A．taller

B．pretty

C．fat

D．healthy

(3)Vitamin pills are made ____________.

[　　]

A．from all kinds of foods

B．in the lab

C．of fresh milk

D．from the sunlight

(4)The scientists are working hard to _____________.

[　　]

A．know whether vitamins can stop some illness

B．make much more vitamin pills

C．become well-known in the world

D．help the patients who need Vitamin C

(5)Which of the following is right according to the passage?

[　　]

A．The vitamins that are added to natural foods are also natural.

B．If you want to be healthy, you'll have to eat more vitamin pills.

C．Vitamins are very important for our health.

D．We can take vitamin pills instead of natural vitamins to keep healthy.

答案：B;D;B;A;C
解析：

(1)根據(jù)文中When sunlight shines on the skin, the body produces Vitamin D.此句可知。

(2)由文章的第一段可知Vitamin C對(duì)身體健康很重要。

(3)由文中Most vitamin pills contain man-made vitamins, which are made in labs. Natural vitamins are found in foods.一句可知。

(4)由文中Scientists are experimenting to find out if vitamins can cure or prevent diseases like cancer and heart disease.一句可知。

(5)本文的主旨就是說明維生素重要。


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