The study helped Gunstad to find out whether losing weight had any effect on mental function.Now that he抯 seen the positive effect that weight loss can have on memory and attention,he says he will next study those who choose to lose weight by the traditiocnal way梕ating healthier and getting more active.He expects that losing weight in this way will have a similarly positive effect on the brain.揑f we can improve the condition with operations,then we can probably produce the same change with behavioral weigocht loss as well,?he saysa.

　　1.There is less research on overweight and cognitive functions because researchers 　. 

　　A.believe overweight only affects our body

　　B.have focused on ways to sharpen people’s mind

　　C.do not consider overweight a main cause for low cognitive ability

　　D.are clear about the relation between weight and mental functions

　　2.The result of Gunstad’s study shows that　. 

　　A.losing weight has little effect on people’s memory

　　B.losing weight can improve people’s mental functions

　　C.overweight people are likely to have psychology problems

　　D.overweight people抯 abilities of concentration differ greatlyi

　　3. What is Gunstad planning to prove next in his research?

　　A.Slim people are smarter than overweight people.

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