B．slowly

　　C．frequently

　　D．occasionally

　　答案：A　由语境可知，西蒙的改变还不算晚，并且是朝着好的方面改变，因为这样我很感激。我无意当中的一句表扬的话语对西蒙的生活产生了如此巨大的影响。

　　Ⅳ.语法填空

　　阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

　　(2015·宁夏银川一中一模)

　　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) temperatures, 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 same­aged 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 high­fat 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 obesity­related 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.”

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