四、短文填空。从下面方框中选择适当的单词并用其正确形式填入短文空格内，使短文意思正确、通顺(每词限用一次)。 Most American families are_1_than the ones in other countries.Most American families have one or two_2_ Children in the US will leave their parents home_3_they grow up.They usually live far from their parents because they want to find good_4_They often write to their parents_5_telephone them.And they often go to visit their parents on holidays. Parents usually let their children choose their_6_jobs.Americans think it is important for young people to decide their lives by_7_ Many people ask the children to do some work_8_their house.And in many families，the parents pay(付钱)their children for _9_some housework so that(为了)they can learn how_10_money for their own use. Now，China has the second largest number of Internet users in the world after the United States.Many of Chinese Internet users are teenagers._1_ On the Internet，students can find out almost anything.Surfing(冲浪) the Internet can help them with their homework and learn a lot of knowledge._2_Many teenagers keep in touch with their friends online.They can also make new friends through QQ or ICQ._3_They like to listen to music，watch films，and go to their favorite stars websites(网站) _4_“They think it takes young people away from study.They spend too much time playing computer games and most games are about killing and fighting._5_And there are some dirty things on the Internet，”says the mother of a 13yearold boy.