完型填空Countrymusicisveryold.ItcamefromtheUnitedStates,Can...
問題詳情：完型填空Countrymusicisveryold.ItcamefromtheUnitedStates,Canada,IrelandandGreatBritain.Itisamixtureof_1_fromalloftheseplaces.InthewestofAmerica,cowboyshadtotakecareofthecattle(牛).Theyhadtowatc...