常考高频词：activity,address,advertisement,advantage,advice,attention,athlete,balance,bottom,bussiness
challenge,chance,change,collection,contribution,choice,competition,cause,custom,courage
decision,design,difference,discussion,duty,distance,description,director,director,direction
education,effort,energy,experiment,excuse,environment,expression,exhibition,experience,explanation
feeling,fun,habit,honour,hobby,information,interest,importance,invention,interview,influence,instructions,invitation
mood,noise,offer,opinion,opportunity,organization,protection,praise,patient,progress,problem,promise,pride
reason,relation,result,research,report,service,shape,stranger,sight,style,support,success,suggestion,sense
technology,tourist,tradition,traffic,trouble,voice,volunteer,visitor,value
