IntheUnitedStates，30percentofthegrown—uppopulationhasa“weight”problem.Tomanypeople，thecauseisclear：theyeattoomuch.Butscientificexperimentsdolittletosupportthisidea.GoingbacktotheA

IntheUnitedStates，30percentofthegrown—uppopulationhasa“weight”problem.Tomanypeople，thecauseisclear：theyeattoomuch.Butscientificexperimentsdolittletosupportthisidea.GoingbacktotheAmericaof1910wefindthatpeoplewerethinnerthantoday，yettheyatemorefood.Inthosedayspeopleworkedharderphysically，walkedmore，usedmachinesmuchless，anddidn’twatchtelevision.

Severalmodernstudies，besides，haveshownthatfatterpeopledonoteatmoreonaveragethanthinnerpeople.Infact，someresearchwork，suchasl970studyof3545LondonOfficeworkers，reportsthatfatpeopleeatlessthanthinnerpeopleontheaverage.

Studiesshowthatthinpeoplearemoreactivethanfatpeople.AstudybytheresearchgroupofSchoolofMedicineatStanfordUniversityfoundthefollowinginterestingfacts.Themoreamanran，thegreaterbodyfathelost.Themoreheran，thegreaterheneededforfood.Thus，thosewhoranthemostatethemost，yetlostthegreateramountofbodyfat.

1Whatkindofphysicalproblemdomanygrown-upAmericanshave?

A.Theyaretoothin.

B.Theyworktoohard.

C.Theyaretoofat.

D.Theylosetoomuchbodyfat.

2.Basedontheinformationgiveninthisarticle，supposethereare500Americans，abouthowmanyofthemwillhavea“weight”problem?

A.30 B.50 C.100 D.150

3.Whathavemodernmedicalandscientificresearchesreportedtous?

A.Fatpeopleeatlessfoodandarelessactive.

B.Fatpeopleeatmorefoodandaremoreactive.

C.Fatpeopleeatmorefoodbutlosegreateramountofbodyfat.

D.Thinpeoplerunlessbuteatmorefood.