2014届高考英语一轮复习 Unit9 指导课时作业B卷（含解析） 北师大版.doc

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1、Unit9B卷一、阅读理解AThegovernmentmaycontrolpriceswhenthereisaproblemsuchasrapidlyincreasingrentsorariseinthecostofliving.Whenthegovernmentcontrolsprices，thereisnolongeranormalrelationshipbetweenthepriceofaproductandthequantityconsumerswillbuy.Governmentcontrolsmayhelpinanem

2、ergency.However，someeconomistsbelievethatcontrolscanhavenegativeeffectsoveralongperiodoftime.Incitieswithrentcontrol，thecitygovernmentsetsthemaximumrentthatalandlordcanchargeforanapartment.Supportersofrentcontrolarguethatitprotectspeoplewhoarelivinginapartments.Theirr

3、entcannotincrease；therefore，theyarenotindangeroflosingtheirhomes.However，thecriticssaythatafteralongtime，rentcontrolmayhavenegativeeffects.Landlordsknowthattheycannotincreasetheirprofits.Therefore，theyinvestinotherbusinesseswheretheycanincreasetheirprofits.Theydonotin

4、vestinnewbuildingswhichwouldalsoberentcontrolled.Asaresult，newapartmentsarenotbuilt.Manypeoplewhoneedapartmentscannotfindany.Accordingtothecritics，theendresultofrentcontrolisashortageofapartmentsinthecity.Sometheoristsarguethattheminimumwagelawcancauseproblemsinthesam

5、eway.Thefederalgovernmentsetstheminimumthatanemployermustpayworkers.Theminimumhelpspeoplewhogenerallylookforunskilled，lowpayingjobs.However，iftheminimumishigh，employersmayhirefewerworkers.Theywillreplaceworkerswithmachinery.Theprice，whichisthewagethatemployerswantdecr

6、eases.Thus，criticsclaim，anincreaseintheminimumwagemaycauseunemployment.Somepoorpeoplemayfindthemselveswithoutjobsinsteadofwithjobsattheminimumwage.Supportersoftheminimumwagesaythatithelpspeoplekeeptheirdignity.Becauseofthelaw，workerscannotselltheirservicesforlessthant

7、heminimum.Furthermore，employerscannotforceworkerstoacceptjobsatunfairwages.Economictheorypredictstheresultsofeconomicdecisionssuchasdecisionsaboutfarmproduction，rentcontrol，andtheminimumwage.Thepredictionsmaybecorrectonlyif“otherthingsareequal”．Economistsdonotagreeons

8、omeofthepredictions.Theyalsodonotagreeonthevalueofdifferentdecisions.Some6economistssupportaparticulardecisionwhileotherscri