Vitamins are organic compounds necessary in small amounts in the diet for the normal growth and maintenance of life of animals, including man.
They do not provide energy, __1__do they construct or build any part of the body. They are needed for 2 foods into energy and body maintenance. There are thirteen or more of them, and if 3 is missing a deficiency disease becomes 4 .
Vitamins are similar because they are made of the same elements — usually carbon, hydrogen, oxygen, and 5 nitrogen. They are different 6 their elements are arranged differently, and each vitamin 7 one or more specific functions in the body.
__8__ enough vitamins is essential to life, although the body has no nutritional use for __9_ vitamins. Many people, 10 , believe in being on the “safe side” and thus take extra vitamins. However, a well-balanced diet will usually meet all the body’s vitamin needs.
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1. A. either |
B. so |
C. nor |
D. never |
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2. A. shifting |
B. transferring |
C. altering |
D. transforming |
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3. A. any |
B. some |
C. anything |
D. something |
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4. A. serious |
B. apparent |
C. severe |
D. fatal |
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5. A. mostly |
B. partially |
C. sometimes |
D. rarely |
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6. A. in that |
B. so that |
C. such that |
D. except that |
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7. A. undertakes |
B. holds |
C. plays |
D. performs |
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8. A. Supplying |
B. Getting |
C. Providing |
D. Furnishing |
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9. A. exceptional |
B. exceeding |
C. excess |
D. external |
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10. A. nevertheless |
B. therefore |
C. moreover |
D. meanwhile |
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