IntheUnitedStates,30percentoftheadult(成年人)populationhasa“weightproblem”.Tomanypeople,thecaseisclear:weeattoomuch.Butscientificevidence（证据）doeslittletosupporttheidea.GoingbacktotheAmericaof

　　IntheUnitedStates,30percentoftheadult(成年人)populationhasa“weightproblem”.Tomanypeople,thecaseisclear:weeattoomuch.Butscientificevidence（证据）doeslittletosupporttheidea.GoingbacktotheAmericaof1910,wefindthatpeoplewerethinnerthantoday.Yettheyatemorefood.Inthosedays,peopleworkedharderphysically,walkedmore,usedmachinesmuchless,anddidn’twatchTV.

　　Severalmodernstudies,moreover,haveshownthatfatpeopledonoteatmoreonaverage(平均)thanthinnerpeople.Infact,someinvestigations(调查),suchasa1990studyof3,545Londonofficeworkers,showthatfatterpeopleeatlessthanslimmerpeople.

　　Studiesshowthatslimpeoplearemoreactivethanfatpeople.AstudybyaresearchgroupofStanfordUniversitySchoolofMedicinefoundthefollowinginterestingfacts:

　　Themorethemenran,themorefattheylost.

　　Themoretheyran,themoretheyate.

　　Thus,thosewhoranthemostatethemost,yetlostthegreatestamountofbodyfat.

　　小题1:WhatkindofphysicalproblemdomanyadultAmericanshave?A．Theyaretoothin.B．Theyworktoohard.C．Theyaretoofat.D．Theylosetoomuchfat.小题2:Whichofthefollowingwordscantaketheplaceoftheword“slim”inthispassage?A．poorB．thinC．healthyD．rich小题3:ComparedwiththeadultAmericanpopulationtoday,theAmericansof1910______.A．atemorefoodandhadmoreactivitiesB．atelessfoodbuthadmoreactivitiesC．atelessfoodandhadlessphysicalactivitiesD．hadmoreweightproblems小题4:Whathavemodernmedicalandscientificresearchesreportedtous?A．Fatpeopleeatlessfoodandarelessactive.B．Fatpeopleeatmorefoodthanslimpeoplebutarelessactive.C．Fatpeopleeatmorefoodthanslimpeoplebutaremoreactive.D．Thinpeoplerunless,buthavegreaterincreaseinfoodintake.