A. EXHALING B. BREATHING C. INHALING D. SWEATINGTASK 2

80. A. exhaling B. breathing C. inhaling D. sweating

Task 2: READING COMPREHENSION

Read the passage and choose the best answer for each question below.

Most human diets contain between 10 and 15 percent of their total calories as protein. The rest

of the dietary energy conies from carbohydrates, fats, and in some people, alcohol.The proportion of

calories from fats varies from 10 percent in poor communities to 40 percent or more in rich

communities.

In addition to providing energy, fats have several other functions in the body. The fat-soluble

vitamins, A, D, E, and K, are dissolved in fats, as their name implies. Good sources of these

vitamins have high oil or fat content, and the vitamins are stored in the body’s fatty tissues. In the

diet, fats cause food to remain longer in the stomach, thus increasing the feeling of fullness for some

time after a meal is eaten. Fats add variety, taste, and texture to foods, which accounts for the

popularity of fried foods. Fatty deposits in the body have an insulating and protective value. The

curves of the human female body are due mostly to strategically located fat deposits.

Whether a certain amount of fat in the diet is essential to human health is not definitely

known. When rats are fed a fat-free diet, their growth eventually ceases, their skin becomes

inflamed and scaly, and their reproductive systems are damaged.Two fatty acids,linoleic and

arachidonic acids, prevent these abnormalities and hence are called eseential fatty acids.They also

are required by a number of other animals, but their roles in human beings are debatable. Most

nutritionists consider linoleic fatty acid an essential nutrient for humans.