OnedaylastSeptember,asBritneySpearswasabouttoboardaflighttoLosAngelesfromLondon,abluebottlefelloutofherpurse.Shequicklyputitbackin,butnotbeforethecamerarecordedtheevent.NeitherSpearsnorherspokesmanwaswillingtocommentonthecontentsofthebottle,butthenextmorningLondon’sDailyExpresspublishedapageofpicturesundertheheadline“EXCLUSIVE:POPPRINCESSSPOTTEDATAIRPORTWITHPOTOFSLIMMINGTABLETS.”SpearswasapparentlycarryingZantrex-3,oneofthemostpopularweight-losspillsnowsoldintheUnitedStates.Thepill,whichissoldataboutfiftydollarsforamonth’ssupply,containsahugeamountofcaffeine,somegreentea,andthreecommonSouthAmericanherbsthatalsoactasstimulants(兴奋剂).IthittheU.S.marketlastMarchandhashadasuccessthatwouldbehardtooverstate.Millionsofbottleshavebeensold,andduringtheChristmasseasonitwasdisplayedinthewindowsofthenation’slargestchainofvitaminshops,G.N.C.(Itissohighlysoughtafterthatmanyofthestoreskeepitinlockedcounters.)Zantrex-3isalsosoldatCVS,RiteAid,Wal-Mart,andotherchains,andoverthetelephoneandontheInternet.Ifyoutype“Zantrex”intoGoogle,morethanahundredthousandpiecesofinformationaboutitwillappear.Atanymoment,therearescoresofpeoplesellitoneBay.

PerhapsthemostinterestingthingaboutthesuccessstoryofZantrex-3,however,isthatitisfarfromunique.Therearehundredsofsimilarproductsonthemarkettoday,andtheyareboughtbymillionsofAmericans.AndthoughZantrex’sproducermakessomeexcitingstatements(“themostadvancedweightcontrolcompound(化合物)period”),sodothepeoplewhosellStacker2andAnorexalongwiththosewhosellCarbEliminatorandFatEliminator.Almostallofthesecompoundssuggestthattheycanhelppeopleloseweightandregainlostenergy,andoftenwithoutdiet,exercise,oranyothereffort.

51.BritneySpearsisa/an______.

A.dancer B.singer C.athlete D.chemist

52.Whichofthefollowingisalsoakindofweight-losspill?

A.CVS &nbs