综合单元测试——Level5Unit7ListeningComprehension请根据需要填入Script：TrueOrFalseTTFTFTFTTF请根据需要填入Script：SpotDictationDirections:Inthispartofthetest,youwilllistentoapassageanditwillnotbewrittenoutinfullforyou.YouwillhearthepassageTHREETIMES.Whilelistening,youarerequiredtofillintheblankswiththeexactwordsyouhear.(10points)Scientistshaveknownforsometimethataseverely11reducedmakessomeanimalslivelonger.Now,researchersaregettingclosertounderstandingwhy.Theysaythefindingmightalsoleadtoasimilarunderstandinginpeople,12andlikediabetes.Scientistshave13aproteininthebody,SIRT-2,asonethatseemsto14.Researchershavemanagedtoincreaselifespansbyupto40percentinfruitflies,yeastandwormsbystimulatingtheover-productionofSIRT-2.Conversely,reductionsintheproteinhaveshortenedtheorganisms'lifespans.ScientiststhinktheymaybeclosetounderstandinghowSIRT-2worksand,potentially,howit15tohelphumanslivelonger.SIRT-216toproduceglucose,atypeofsugar,whichthe17body.Glucosealsocomesfromthefoodweeat,butexcessglucosefromfoodcausesmorewearandtearoncellsthanthenaturalglucoseproducedbyliver.Themorewearandtear18the.fasterCellbiologistandstudyauthorPerePuigserversayspeopleagebecause19theirbodiesbyexcessglucosefromfood."20isnotonlyaffectingaging,butisalsoincreasingfatandglucosethatdamageothertissuesbycreatingoxidativestressduetohypoglycemiaorhighfatcontent,"heexplained."Andthatconsequentlydecreaseslifespan."11.请根据需要填入Script：正确答案：foodintake12.请根据需要填入Script：正确答案：atreatmentfordiseases13.请根据需要填入Script：正确答案：homedinon14.请根据需要填入Script：正确答案：affectlongevity15.请根据需要填入Script：正确答案：mightbeharnessed16.请根据需要填入Script：正确答案：stimulatestheliver17.请根据需要填入Script：正确答案：usesasfuel18.请根据需要填入Script：正确答案：thebodyages19.请根据需要填入Script：正确答案：areconstantlybeingbombarded20.请根据需要填入Script：正确答案：IncreasingcalorieintakeReadingComprehensionDirections:Therearetwopassagesinthispart.Eachpassageisfollowedbysomequestionsorunfinishedstatements.Foreachofthemtherearefourchoices.Clickonthe