Weknowthatcigarettesmokingkills．Soproducersmadeelectroniccigarettesasasafersmokingchoice-saferthantobacco．Althoughe-cigarettescontainthedrugnicotinelikecigarettestheydonotusetobaccoandyoudonotlightt

　　Weknowthatcigarettesmokingkills．Soproducersmadeelectroniccigarettesasasafersmokingchoice-saferthantobacco．Althoughe-cigarettescontainthedrugnicotinelikecigarettestheydonotusetobaccoandyoudonotlightthem．Theyarepoweredbybattery（电池）．

　　Howeverife-cigarettesaresosafewhyhastheUnitedStatesCenterforDiseaseControl（CDC）seenanincreaseintelephonecallsaboute-cigarettepoisonings?

　　Theanswerischildren．MostofthecallsarefrompeopleworriedaboutchildrenwhohaveplayedwiththedevicesIntheperiodofonemonththisyeartheCentersaid215peoplecalledtheCenterwithe-cigaretteconcerns．Morethanhalfofthesecallswereforchildrenagedfiveandyounger．Thedeviceshadmadethemsick．

　　TimMcAfeeisdirectoroftheCenter'sOfficeonSmokingandHealthHesaystheproblemisregulation．MeaningtheU．S．federalgovernmentdoesnotcontrole-cigaretteseventhoughtheycontainliquidnicotine．Mr．McAfeeaddsthatliquidnicotineisawell-knowndanger．Mr．McAfeeexplainsthatnicotinepoisoninghappenswhenitgetsintotheskingetsintotheeyesorisswallowed．Itcancausestomachpainorasenseofunbalance．Andtoomuchnicotinecankill

　　TimMcAfeesayse-cigarettesdonotcreatethelevelofrisktopeoplethattobaccoproductsdo．Henotesthatalmost500000Americansdieeachyearfromcigarettes．"Socigarettesarethewinnerinthatcontest．"E-cigarettesdonotcontainhundredsofharmfulchemicalsthatarefoundinrealcigarettes．SotheU．S．SurgeonGeneralBorisD．Lushniakhassuggestedthate-cigarettesmaybeausefultoolforadultstryingtoendtheirtobaccouse．

　　ButMcAfeeworriesthatteenagersmaythinkelectroniccigarettesareharmless．Theycouldbecomeaddictedtothenicotineandthenstartsmokingrealcigarettes．Inotherwordshefearsthatforyoungpeoplefakee-cigarettescouldbea"gateway"totherealthing．

　　1.Whatdotheproducersthinkofe-cigarettes?

　　A．Dangerous．B．Expensive．

　　C．Safer．D．Cheaper．

　　2.WhydidtheCDCreceivesomanycallsaboute-cigarettes?

　　A．Parentsfearedthattheirchildrenmightgetpoisoned

　　B．Parentsfoundthedeviceuselessinquittingsmoking．

　　C．Childrenswallowedtheli