Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word for each of the blanks. It was once believed that being overweight was healthy, but nowadays few people _____(41) to this viewpoint. 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 conclusions of these studies may give _______(42) 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._____ (43) investigations with both humans and animals indicated that it is not food which relieves tension but_______ (44) the act of chewing. A test in which subjects were _______(45) showed that obese people have a keener sense of taste and ________(46) more flavorful food than non-obese people. When deprived of the variety and intensity of taste, obese people are not satisfied andconsequently eat more to _____(47) this need. Blood samples taken from people after they were shown a picture of food revealed that overweight people reacted with an increase in blood insulin. a chemical _____(48) with appetite. This did not happen to people of average weight. 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 exercise, such as using the stairs instead of the elevator, is better in the long run than taking on a _____(49) program, such as jogging, which many people find difficult to continue over long periods of time and which also increases_____ (50). Notes: - to subscribe to something: tán thành - to induce: gây ra   Trả lời cho các câu 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 dưới đây: