大学英语clozeInapurelycompetitivemarket,thesupplierofgoodsandserviceshasnocontroloverthemarketprice,becauseheproducestoolittletoinfluencemarketconditions.Withnodifferencebetweenhisproductsandtheproducts____(36)his

　　大学英语cloze

　　Inapurelycompetitivemarket,thesupplierofgoodsandserviceshasnocontroloverthemarketprice,becauseheproducestoolittletoinfluencemarketconditions.Withnodifferencebetweenhisproductsandtheproducts____(36)hiscompetitors,hewillsellnothingifhechargesabovethemarketpriceandhewillsellallifhechargesator____(37)themarketprice.However,inconsideringtheprice,hemusttakethe___(38)ofproductionintoconsideration.Therearetimeswhenhemaybewillingtosellbelowhiscost.Thismighthappenwhenpricestumblefor___(39)hebelieveswillbeashorttime.However,nobusinesspersoncan___(40)tolosemoneyforaprolongedperiod.Hemustbeconstantly____(41)ofhiscostsinrelationtothemarketpriceifheistocompetessuccessfullyandearnaprofit.

　　Manypeoplehavetheimpressionthatasproductionincreases,costsperunitdecrease.___(42)massproductionhasmadethistrueincertainindustriesandatcertainlevelsofproduction,___(43)logicandpracticalexperienceshaveshownthatcostsperunitbegintorisebeyondacertainlevelofproduction.Someeconomists____(44)tothisprincipleasthelawofincreasingcosts.

　　Thereasoncostsriseasproductiongoesupis____(45).However,itiseasytorecognizethatasproductiongoesup,theneedforadditionalfactorsofproductionwillalsogrow,___(46)competitivebiddinginthemarketplaceforthefactorsofproduction.Ifaproducerneeds___(47)skilledlabortoproducemore,andnoneofthislaborisunemployed,theproducerwillhavetoget____(48)fromothersources.Thiscanbedoneby___(49)higherwages.Higherbiddingwouldalsoapplytotheotherfactorsofproduction.Wemustalsorecognizethatnotalllaborisequallyproductive,____(50)notalllandisequallyfertileandnotallore(矿石)isequallyrichinthemineralwanted.

　　36AtoBatCofDon

　　37AbelowBbeneathCoverDabove

　　38ApriceBcostCworthDprofit

　　39AthatBwhyCwhatDif

　　40AaffordBpretendCofferDtry

　　41AsureBafraidCawareDsuspicious

　　42ABecauseBSinceCWhenDWhile

　　43AbothBneitherCnoneDany

　　44AresortBreferCturnDattend

　　45AclearBsimpleCdifficultDcomplex

　　46AbringingB