Scientists have discovered that 1.(stay) in the cold could help us lose weight.Researchers at the University of California found that exposure to the cold increases levels of a protein that helps form brown fat—the type of fat that produces heat and keeps us warm.Brown fat burns energy,2. helps us lose weight.White fat stores extra energy,which results 3.- weight gain.The researchers said that because air conditioning and heating give us constant, 4.-(comfort) temperature,our body’s need for brown fat has decreased.They found that,“Outdoor workers in northern Finland who 5.-(expose) to cold temperature have 6.- significant amount of brown fat when 7.-(compare) to same-aged indoor workers.”
The research was conducted on two different control groups of mice.8.- group was injected with the protein that helps create brown fat.This group later gained 30% less weight after both groups were fed high-fat diets.The researchers say this could be good news in the fight against obesity.People who are obese have 9.-(low) levels of brown fat than thinner people.Head researcher Hei Sook Sul said,“This protein could become an important target for research into the treatment and prevention of obesity and obesity-related diseases.” She added,“If you can somehow increase levels of this protein,you could 10.-(possible) lose more weight even if eating the same amount of food.”


（B）
1.staying　解析 考查非谓语动词。从结构可知此处是非谓语动词做主语,用动词-ing形式。故填staying。
2.which　解析 考查关系代词。在非限制性定语从句中缺少主语,用关系代词which指代前句话的内容。
3.in　解析 考查介词。result in “导致,造成”。故填in。
4.comfortable　解析 考查形容词。此处所填词和constant并列做temperature的定语,故用形容词形式。
5.are exposed　解析 考查谓语动词。expose是及物动词,句中没有宾语,由此可判断用被动形式。be exposed to “暴露在……之下”,根据主谓一致原则,填are exposed。
6.a　解析 考查冠词。a significant amount of “大量的”。故填a。
7.compared　解析 考查非谓语动词。此处是“连词+分词”结构,compare和句子主语workers之间是被动关系,用过去分词。填compared。
8.One　解析 考查数词。从上文内容可知此处指两组中的一组,因位于句首,故填One。
9.lower　解析 考查比较级。根据句中than可知此处用比较级,且修饰名词levels,用形容词。故填lower。
10.possibly　解析 考查副词。修饰动词lose用副词形式,故填possibly。