ners to volunteer to gain weight. In four to six months, they ate as much as they could. They succeeded in increasing their weight by 20 to 25 percent. But months after the study ended, they were back to normal weight and stayed there.

　　This does not mean that people are completely without hope in controlling their weight. It means that those who tend to be fat will have to constantly battle their genetic inheritance if they want to significantly lower their weight.

　　The findings also provide evidence for something scientists thought was true - each person has a comfortable weight range. The range might be as much as 9kg. Someone might weigh 60-69kg without too much effort. But going above or below the natural weight range is difficult. The body resists by feeling hungry or full and changing the metabolism to push the weight back to the range it seeks.

　　36 What determines your weight?

　　A Your working manner.

　　B Your eating habit,

　　C Your life style.

　　D Your genes.

　　37 What did Jules Hirsch do to the eight fat people in his study?

　　A He let them skip supper.

　　B He let them skip breakfast.

　　C He let them run every morning and evening.

　　D He gave them a liquid formula providing 600 calories a day.

　　38 What happened to the eight fat people after they left the hospital?

　　A They went mad.

　　B They killed themselves.

　　C They were back to normal weight.

　　D They attempted suicide.

　　39 Ethan Sims made his subjects

　　A battle their genetic inheritance.

　　B increase their weight.

　　C suffer from hunger.

　　D lower their weight.

　　40 What did scientists think was true?

　　A Each person has a fixed weight range.

　　B Each person has a weight range of 9kg.

　　C Each person wants to control his or her weight.

　　D Each person wants to eat to his or her heart's content.

　　第三篇

　　Shaming Punishments

　　Last month, James Connolly, a junior at the Univers