4.Scientists have discovered that  (61)staying (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,(62)which helps us lose weight.White fat stores extra energy,which results (63)in weight gain.The researchers said that because air conditioning and heating give us constant,  (64)comfortable (comfort) temperatures,our body's need for brown fat has decreased.They found that:"Outdoor workers in northern Finland who (65)areexposed (expose) to cold temperature have (66)asignificant amount of brown fat when (67)compared(compare) to same-aged indoor workers."
The research was conducted on two different control groups of mice.(68)One 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  (69)lower(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 (70)possibly (possible) lose more weight even if eating the same amount of food."

分析 本文主要講述科學(xué)家發(fā)現(xiàn)呆在寒冷的地方可以使人減輕體重.

解答 61.staying 考查動名詞.分析句子結(jié)構(gòu),句中缺少主語,此處是動名詞短語staying in the cold作主語.
62.which 考查定語從句.分析句子結(jié)構(gòu)可知這是一個定語從句,先行詞energy指物,在從句中作主語,用關(guān)系代詞which.
63.in 考查固定搭配.result in意為"導(dǎo)致,造成",是固定搭配.
64.comfortable 考查形容詞.此處是comfortable和constant并列作temperatures的定語.
65.a(chǎn)re exposed 考查動詞時態(tài)和語態(tài).expose是及物動詞,句中沒有賓語,要用被動形式.be exposed to 意為"暴露在…之下",根據(jù)主謂一致原則,用are exposed.
66.a(chǎn) 考查冠詞.a(chǎn) significant amount of"大量的",是固定搭配.
67.compared 考查過去分詞.此處是"連詞+分詞"結(jié)構(gòu),compare和句子主語outdoor workers之間是被動關(guān)系,用過去分詞.
68.One 考查數(shù)詞.根據(jù)前面一句two different control groups of mice,此處是指其中的一組,用one.
69.lower 考查形容詞比較級.根據(jù)句中than可知此處用比較級,修飾名詞levels,用形容詞比較級.
70.possibly 考查副詞.副詞修飾動詞lose,形容詞possible的副詞是possibly.

點評 在一篇200詞左右的語篇(短文或?qū)υ挘┲辛舫?0處空白,部分空白的后面給出單詞的基本形式,要求考生根據(jù)上下文填寫空白處所需的內(nèi)容或所提供單詞的正確形式,所填寫詞語不得多于3個單詞.要做好語法填空題,理解短文是解題的前提,扎實的詞匯、句型和語法知識是基礎(chǔ),英語國家的背景知識是必要的補充.考生須靈活運用語法知識,如單詞詞性、單詞時態(tài)、名詞單復(fù)數(shù)、連接詞、代詞、冠詞等判斷各空白處應(yīng)填寫的內(nèi)容.答完后,還要通讀全文,核對所填單詞形式是否正確,是否符合語境.

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