Personality Traits. Foods and Energy. Effects of Alcohol on the Body (Тексты для перевода), страница 4

No more accurate account of the ef­fects of one or two drinks can be given because many factors determine a per­son's reactions to alcohol. The most im­portant ones are the person's weight, his metabolism, the amount of food in his stomach, and the rate at which he drinks. One person might be under the influence of alcohol after one drink. Another might not become noticeably affected until he had had three or more.

The important point to remember, however, is that even one drink af­fects the nervous system and hinders its operation. If one drink acts in this way, think of what three or four or more drinks will do!

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Discovering New Vitamins

Long ago scientists ₁___ (realize) that there were many unknown substances vital in human nutrition. They ₂ ___ (search) for these new substances for many years before one of the important discoveries of this sort ₃___ (take place) in 1948, when vitamin B_{12   4}___ (discover).

Another step forward ₅___ (make) in 1946, when scientists of the US Department of Agriculture ₆___ (find) a factor in milk that was essential to the growth and reproduction of mice.

The discovery of vitamin B_{12  7}___ (have) great influence on people everywhere. Not only the vitamin ₈___ (prove) to be of great value against pernicious anemia, but it ₉___ (show) to be essential for the growth of animals.

Now everyone knows that vitamin B_{12   10}___ (play) a part in preventing anemia and it is necessary for normal growth. Vitamin B_{12   11}___ (find) in foods that ₁₂___ (come from) animals, including fish, meat, poultry, eggs, milk, and milk products. It is structurally the most complicated vitamin and it ₁₃___ (contain) the biochemically rare element cobalt.

Because the discovery of the vitamin ₁₄___ (make) comparatively recently, there ₁₅___ (be) still several unknown characteristics. Nowadays scientists ₁₆___ (try) to find out the minimum daily requirements of vitamin B₁₂ and the ways the body ₁₇___ (use) it to make red blood cells. The answers to these questions ₁₈___ (be) long in coming, but when they ₁₉___ (come), they ₂₀___ (help) complete the puzzle of human nutrition.

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The danger of some health foods is that people may be fooled 1_____ (into, -, in, at) relying

2_____ (on, at, onto, in) them for their basic source of food.

Sometimes crash diets depend 3 _______ (in, of, from, on) special medicines.

  One can have a great deal of control 4______ (over, upon, above, of) one’s nutrition.

 5 ______ (At, in, from, since) ancient times, women have hung meat and fish 6___________ (in front of, over, upon, above) fires and have heated them until all the water was driven 7_____ (out, from, away, off).

 Dried foods are preserved because there is little water in them 8______ (in, on, from, with) which bacteria can grow.

 The warm air dried the particles of food 9_____ (without, by, through, with) destroying much of the nutritional value.

The committee members analyzed hundreds of research studies 10____ (about, on, of, in) the effects of smoking

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VARIANT 4

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