2021年全国甲卷阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。TheXi'anCityWallisthemostcompletecitywallthathassurvivedChina'slonghistory.It41___(build)originallytoprotectthecity42___theTangdynastyandhasnowbeencompletelyrestored(修复).Itispossible43___(walk)orbiketheentire14kilometers.WeaccessedthewallthroughtheSouthGate.Thewallis12metershighandfromhereyoucanseestreamsofpeoplemovinginsideandoutsidetheCityWall.After44____(spend)sometimelookingatallthedefensiveequipmentatthewall,wedecideditwastimeforsomeactionandwhat45___(good)thantorideonapieceofhistory!We46___(hire)ourbikesfromtherentalplaceattheSouthGate.Mybikewasoldandshaky47___didthejob.Ittookusabout3hourstogoall48___wayaroundtheXi'anCityWall.Supposedlyyoucandoitintwohours,butwestoppedatthedifferentgatesand49____(watchtower)totakepicturesorjusttowatchthelocalpeoplegoingabouttheir50____(day)routines.2021年全国乙卷阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。Ecotourismiscommonlyregardedaslowimpact(影响)traveltoundisturbedplaces.Itisdifferentfromtraditionaltourismbecauseitallowsthetravelertobecome61(educate)abouttheareas-bothintermsofgeographicalconditionsandculturalcharacteristics,andoftenprovidesmoneyforconservationandbenefitsthe621(develop)ofthelocalareas.Ecotourismhas63(it)originwiththeenvironmentalmovementofthe1970s.Itwasnotwidelyacceptedasatravelconcept64thelate1980s.Duringthattime,increasingenvironmentalawarenessmadeitdesirable.Dueto65growingpopularityofenvironmentally-relatedandadventuretravel,varioustypes66tripsarenowbeingclassifiedasecotourism.Actually,atrueeco-friendlytripmustmeetthefollowingprinciples:Minimizetheimpactof67(visit)theplace.Buildrespectforandawarenessoftheenvironmentandculturalpractices.Provide68(finance)aidandotherbenefitsforlocalpeoples.Makesurethatthetourismprovidespositiveexperiencesforboththevisitorsandthehosts.KomodoNationalPark,officiallyrecognizedin1980,ispopularforecotourismbecauseofitsuniquebiodiversity.69(activity)thererangefromwhalewatchingtohiking(远足)andaccommodat