Reading the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions:

It was once believed that being overweight was healthy, but nowadays few people subscribe to this view point. While many people are fighting the battle to reduce weight, studies are being conducted concerning the appetite and how it is controlled by both emotional and biochemical factors. Some of the conclusion of these studies may give insight into how to deal with weight problems. For example, when several hundred people were asked about their eating habits in times of stress, 44 percent said they reacted to stressful situations by eating. Further investigations with both humans and animals indicated that it is not food which relieves tension but rather the act of chewing. A test in which subjects were blindfolded showed that obese people have a keener sense of taste and crave more flavor food than non-obese people. When deprived of the variety and intensity of tastes, obese people are not satisfied and consequently eat more to fulfill this need. Blood samples taken from these people after they were shown a picture of food revealed that overweight people reacted with an increase in blood insulin, a chemical associated with appetite. This did not happen with average-weight people. In another experiment, results showed that certain people have a specific, biologically induced hunger for carbohydrates. Eating carbohydrates raises the level of serotonin, a neurotransmitter in the brain. Enough serotonin produces a sense of satiation, and hunger for carbohydrates subsides. Exercise has been recommended as an important part of a weight-loss program. However, it has been found that mild exercises, such as using stairs in stead of the elevator, is better in the long run than taking on a strenuous program, such as jogging, which many people find difficult to continue over periods of time and which also increase appetite.  

Question: What is the main purpose of the passage ?         


A. To discuss the health problems caused by being overweight                           


B. To recommend a weight-loss program for the obese


C. To help overweight people overcome their eating problem


D. To present research into factors causing obesity  

Đáp án và lời giải
Đáp án:D
Lời giải:

Đáp án D

Dịch nghĩa : Mục đích chính của bài văn là: A. Thảo luận về vấn đề sức khoẻ gây nên bởi việc béo phì. B. Khuyến cáo 1 chương trình giảm cân cho người béo phì. C. Giúp người béo phì vượt qua vấn đề ăn uống. D. Để trình bày nghiên cứu về các nhân tố gây nên béo phì.     

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