5、1.contextn.环境;背景2.anchorn.新闻节目主播3.ratingn.收视率TaskAnswerthequestions:1.Whatdoesahostorhostessdo?HeorshepresentsaprogramorashowontheradioorTV.2.What’sthemeaningofprimetime?ThetimeofadaywhenmostpeoplewatchTV.3.Whatcanattractmoreadvertisingorcommercials?Highaudiencefigures/Goodratings.PeriodOne W