The main function of newspapers is to report news.Many newspapers also provide special information to readers,such as weather reports and television timetables.They also provide comments on politics, economics,arts and culture.Almost all newspapers depend on advertising to make money. Nearly six out of ten adults in the United States and Canada read a newspaper every day.Seven out of ten read a paper each weekend. Readers search newspapers for detailed background information(背景资料)and analysis(分析).This is what television and radio news reports seldom offer.Newspapers tell readers what happened,and they also help readers understand what caused an event and how it will affect the world around them.