Stevenisintheninthgr的精选

问题详情：任务型阅读。阅读下文并回答问题。Stevenisintheninthgradenow.Helikesdoingprojects(软件)atschool.Twoyearsago，hemadeadigitalprogramforthetrafficsystem.Aftergettingtheprize,hegottheadvicefromhisfath...