阅读理解。阅读下列四篇短文，从每小题后所给的A,B,C或D四个选项中，选出最佳选项。Fewlawsaresoeffectivethatyoucanseeresultsjustdaysaftertheytakeeffect.Butintheninedayssincethefederalcigarettetaxmorethandoubled－to$1.01perpack－smokershavejammedtelephone“quitlines”acrossthecountryseekingtokickthehabit.Thisisnotasurprisetopublichealthadvocates.They'vestudiedtheeffectofstatetaxincreasesforyears，findingthatsmokers，especiallyteens，arepricesensitive.Norisitashocktotheindustry，whichfiercelyfightseverytaxincrease.Theonlywonderisthatsomanystatesinsistonclosingtheirearstothemessage.Tobaccotaxesimprovepublichealth，theyraisemoneyandmostparticularly，theydeterpeoplefromtakingupthehabitasteens，whichiswhennearlyallsmokersareaddicted.Yettherateoftaxationvarieswidely.InManhattan，forinstance，whichhasthehighesttaxinthenation，apackofMarlboroLightKings，cost$10.06atonedrugstoreWednesday.InCharleston，S.C.，wherethe7centapacktaxisthelowestinthenation，thepricewas$4.78.Theinfluenceisobvious.InNewYork，highschoolsmokinghitanewlowinthelatestsurveys－13.8%，farbelowthenationalaverage.Bycomparison,26%ofhighschoolstudentssmokeinKentucky.Otherlowtaxstateshavesimilarlydepressingteensmokingrecords.HalRogers，RepresentativefromKentucky，likethosewhoareagainsthightobaccotaxes，arguesthattheburdenofthetaxfallsonlowincomeAmericans“whochoosetosmoke.”That'strue.Butthereismorereasoninkeepingfuturegenerationsoflowincomeworkersfromgettinghookedinthefirstplace.Asfortoday'sadults，ifthenewtaxdrivesthemtoquit，theywillhavemoretospendontheirfamilies，cuttheirriskofcancerandheartdiseaseandfeelbetter.【语篇解读】烟草税增加后，取得了立竿见影的效果——许多烟民纷纷戒烟。然而有些地方却对此充耳不闻，中学生吸烟的比例居高不下。本文让我们意识到：从长远看，通过增加烟草税而使人们戒烟是泽被千家万户的大事。1．Thetextismainlyabout________.A．thepriceofcigarettesB．therateofteensmokingC．theeffectoftobaccotaxincreaseD．thedifferencesintobaccotaxrate解析主旨大意题。本文主要谈论的是烟草税增加后取得的明显效果以及给人们带来的益处。A、B、D三项均为文章的某一方面。答案C2．Whatdoestheauthorthinkisasurprise?A．Teensmokersarepricesensitive.B．Somestatesstillkeepthetobaccotaxlow.C．Tobaccotaxesimprovepublichealth.D．Tobaccoindus