题目内容：
Questionsarebasedonthefollowingpassage. Whenyouthinkaboutthegrowthofhumanpopulationoverthelastcenturyorso,itisalltooeasytoimagineitmerelyasanincreaseinthenumberofhumans.Butaswe（36）,sodoallthethingsassociatedwithus,（37）ourlivestock(家畜).Atpresent,thereareabout1.5bil-lioncattleanddomesticbuffaloandabout1.7billionsheepandgoats.Withpigsandpoultry,theyforma（38）partofourenormousbiologicalfootprintuponthisplanet.
Justhowenormouswasnotreallyapparentuntilthe（39）ofanewreport,called"Live-stock'sLongShadow,"bytheFoodandAgricultureOrganisationoftheUnitedNations.
Considerthesenumbers.Globallivestockgrazing(放牧)andfeedproductionuse"30percentofthelandsurfaceoftheplanet."Livestock--whichconsumemorefoodthanthey（40）--alsocompetedirectlywithhumansforwater.Andthedrivetoexpandgrazinglanddestroysmorebiologicallysensitiveterrain,rainforests（41）,thananythingelse.
Butwhatisevenmorestriking,andalarming,isthatlivestockare（42）forabout18per-centoftheglobalwarmingeffect,morethantransportation's（43）.Theculprits(罪魁祸首)aremethane--thenaturalresultofbovinedigestion--andthenitrogenemittedbymanure.
Deforestationofgrazinglandaddstotheeffect.
Therearenoeasytrade-offswhenitcomestoglobalwarming--suchascuttingbackoncattletomakeroomforcars.Thehuman（44）formeatiscertainlynotabouttoendanytimesoon.As"Livestock'sLongShadow"makesclear,ourhealthandthehealthoftheplanetde-pendonpushinglivestockproductioninmore（45）directions.
A．publication
B．waste
C．contribution
D．certainly
E.yield
F.multiply
G.critical
H.passion
I.concerning
J.available
K.liable
L.sustainable
K.responsible
N.including
O.especially
第(36)题应填__________
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