一篇英语的文章（却词填空,首字母已给）请各位英语天才,“权威”帮帮忙吧
three things are necessary for us to l______ on.they are air,water and f____ .we eat meals t____ or three times every day.we drink water several times a day.we breathe air day and n___.if a man doesn't t_____ any food he can live about three weeks.if he has no water ,he can't live for a ____ three days .but if he doesn't breathe ,he w____ die in three minutes.