Passage3 Questions11to15arebasedonthefollowingpassage: About70millionAmericansaretryingtolossweight.Thatisalmost1outofevery3peopleintheUnitedStates.Somepeoplegoonideas.Thismeanstheyeatlesscertainfoods,especiallyfatsandsugars.Otherpeopleexercisewithespecialequipment,takedietpills,orevenhavesurgery.Losingweightishardwork,anditcanalsocostalotofmoney.SowhydosomanypeopleintheUnitedStateswanttoloseweight? ManypeopleintheUnitedStatesworryaboutnotlookingyoungandattractive.Formanypeople,lookinggoodalsomeansbeingthin.Otherpeopleworryabouttheirhealth.Manydoctorssaybeingoverweightisnothealthy.ButareAmericansreallyfat?Almost30millionAmericansweightatleast20percentmorethantheiridealweight.Infact,theUnitedStateisthemostoverweightcountryinthewild.“ThestoredfatofadultAmericansweight2.3trillionpounds,”saysUniversityofMassachusettsanthropologist(人类学家)GeorgeArmelagos.Hesaysburningoffthatstoredenergywouldproduceenoughpowerfor900,000carstogo12,000miles. Losingweightishardwork,butmostpeoplewanttofindafastandeasywaytotakeofffat.Bookstoresselllotsofdietbooks.Thesebookstellreadershowtoloseweight.Eachyear,dozensofnewbookslikethesearewritten.Eachoneboaststohelppeopletogetridoffat. 11.WhichofthefollowingisNOTmentionedasawayoflosingweight? A.Toeatlessfatsandsugars.B.Toworkhard. 12.ManyAmericansaretryingtoloseweightbecause. A.theywanttolookattractiveB.theyaremisledbydoctors C.theywanttokeepfitD.bothAandC 13.Thefiguresgiveninthesecondparagraphsuggestthat. A.AmericansaredependentoncarsB.carsconsumealotofmoney C.AmericansneedloseweightD.excessoffatcanbeasourceofenergy 14.Itcanbeinferredfromthelastparagraphthat. A.dietbooksarenotalwayseffectiveB.dietbooksareusuallyhelpful C.therearelotsofwaysoflosingweightD.bookstoresarekeepingtheirpromises 15.Itcanbeconcludedfromthepassagethat. A.peoplethinktoomuchoftheirappearance B.thereisnotasurewayoflosingweightasyet C.surgeryisthefastestwayoflosingweight D.goingondietisasafewayoflosingweight