OK，soyouthinkyou'regreen，doyou？Iknowyou：youliveinamoderncity，don'tyou？Youkeepyourbottlesandtakethemtothebottlebank．Youhaveablackbinandagreenbin，oneforcommonwasteandoneforrecyclable（循环的）

　　OK，soyouthinkyou'regreen，doyou？Iknowyou：youliveinamoderncity，don'tyou？Youkeepyourbottlesandtakethemtothebottlebank．Youhaveablackbinandagreenbin，oneforcommonwasteandoneforrecyclable （循环的）waste．Yourcaruseslead-freepetrol．Youusethesameplasticbageverytimeyougotothesupermarket．Maybeyoueverncycletoworkfromtimetotime．Youareplayingyourpart； youunderstandswell； youaregreenandenvironment-friendly．Well，I'vegotnewsforyou：

　　YOUARENOTDOINGENOUGH!

　　●Ifyoudon'tbelieveme，lookatthesefacts．

　　Trustme，they'refromaBBCwebsite．

　　●EverypersonintheUKthrowsawaytheirownbodyweightinrubbisheverysevenweeks．

　　●Everyyear，eachdustbinhasenoughunusedenergyfor500hotbaths，3，500hotshowersor5，000hoursoftelevision．

　　●EveryUKhouseproducesoveronetonofrubbisheveryyear．

　　●AtChristmasover83squarekilometresofwrappingpaperisthrowninthebin．

　　Doyouneedtodomore？No？OK，herearetwomorefacts．

　　●Recyclingjustoneplasticbottlesavesenoughenergytopoweralightbulbforsixhours．

　　●Collectingdustbinsandcleaningstreetscost￡1.6billionperyear．

　　Surelyyoumustbelievemenow．Youneedtodomore．Thegoodnewsisthatthereissomethingelseyoucando．

　　50．EeverypersonintheUKthrowsaway___everysevenweeks．

　　A．onetonofrubbish

　　B．twotonsofrubbish

　　C．theirownbodyweightinrubbish

　　D．twobodiesweightinrubbish

　　51．AtChristmasover___squarekilometresofwrapingpaperisthrowninthebin．

　　A.83

　　B.500

　　C.3，500

　　D.5，000

　　52．___cost￡0.8billionhalfayear．

　　A．Recyclingjustoneplasticbottle

　　B．Collectingdustbinsandcleaningstreets

　　C．Throwingawaycommonrubbish

　　D．Beleivingwhatthewritersays．