这道题应该选择A.a;the
一般情况下,a/an都用于范指,the用于特指:
aman,achild,adog,anorange...
themaninthecar,thechildnexttome,thedogwiththreelegs,theorangeoverthere...
专有名词:theUnitedStatesofAmerica,theUnitedKingdomofGreatBritainandNorthernIreland,thesun,theearth,themoon...
一些固定用法中,如:theother,inthemorning,intheafternoon,intheevening...
atnoon,athome,atschool...零冠词需要特殊记忆