Mostyoungpeopleenjoysomeform.ofphysicalactivity.Itmaybewalking,bicycling,orswimming,orinwinter,skatingorskiing.Itmaybeagameofsome(11)-football,hockey,golfortennis.Itmaybemountaineering.Thosewhohaveapassionforclimbinghighanddifficultmountainsareoften(12)withastonishment.Whyaremenandwomenwillingtosuffercoldandhardship,andtotakerisksonhighmountains?Thisastonishmentiscaused,(13),bythedifferencebetweenmountaineeringandotherformsofactivitytowhichmengivetheirleisure.
Mountaineeringisasportand(14)agame.Therearenoman-maderules,asthereareforsuchgamesasgolfandfootball.There,(15),rulesofadifferentkindwhichitwouldbedangeroustoignore,butitisthisfreedomfromman-maderulesthatmakesmountaineering(16)tomanypeople.Thosewhoclimbmountainsarefreetousetheirownmethods.
Ifwecomparemountaineeringandothermore(17)sports,wemightthinkthatonebigdifferenceisthatmountaineeringisnota“teamgame”.Weshouldbemistaken(18)this.Thereare,itistr ue,no“matches”between“team”ofclimbers,butwhenclimbersareonarockfacelinkedbyaropeonwhichtheirlivesmaydepend,thereis(19)teamwork.
Themountainclimberknowsthathemayhavetofightforcesthatarestr ongerandmorepowerfulthanman.Hehastofighttheforcesof(20).Hissportr equireshighmentalandphysicalqualities.
A.part
B.sorts
C.sport
D.kind
正确答案：D[解析]某种类型的运动用kind。
