Mostpeoplehavehadadogorwantedoneastheircompanionatsometimeintheirlives.Ifyouarethinkingofbuyingadog,however,youshouldfirstdecidewhatsortofcompanionyouneedandwhetherthedogislikelytobehappyinthesurroundingsyoucanprovide.Specialistadviceisavailabletohelpyouchoosethemostsuitablebreedofdog.Butinpart,thedecisiondependsoncommonsense.Mostbreedswereoriginallydevelopedtoperformspecifictasks.So,ifyouwantadogtoprotectyouoryourhouse,forexample,youshouldchooseabreedthathastherightsizeandcharacteristics.Youmustalsobereadytodevoteagooddealoftimetotrainthedogwhenitisyoungandgiveittheexerciseitneedsthroughoutitslife,unlessyouliveinthecountryandcanletitrunfreely.Dogsaredemandingpets.Whereascatsidentifywiththehouseandsoarecontentiftheirplacethereissecure,adogidentifieswithitsmasterandconsequentlywantshimtoshowproofofhisaffection.Thebesttimetobuyababy-dogiswhenitisbetween6and8weeksoldsothatitcantransferitsaffectionfromitsmothertoitsmaster.Ifbabydogshavenotestablishedarelationshipwiththehumanbeinguntiltheyareoverthreemonthsold,theirstrongerrelationshipwillalwaysbewithdogs.Theyarelikelytobetooshywhentheyarebroughtoutintotheworldtobecomegoodpets.
Questions11to13arebasedonthepassageyouhavejustheard.
11.What'smentionedasaconsiderationinbuyingadog?
12.Whydoesthespeakersayadogisamoredemandingpetthanacat?
13.Whyisitadvisedtobuybabydogsunderthreemonthsold?
17.A)Morejobscouldbeprovidedthanbefore.
B)Morepeoplecouldbeeducatedthanbefore.
C)Morebookscouldbeprintedanddistributed.
D)Morewayscouldbeusedtoexchangeknowledge.
20.A)Moreandmorepaperisbeingconsumednowadays.
B)Paperenablespeopletoreceiveeducationmoreeasily.
C)Theinventionofpaperisofgreatsignificancetoman.
D)Papercontributesalottothekeepingofhistoricalrecords.