The mobile phone has become a problem for middle schools. Some middle schools in Australia have banned (禁止) students from carrying mobile phones during school hours.

    Mobile phone use among children has become a problem for schools. Several children have got mobile phones from parents and friends as Christmas gifts, and more students will want them.

    Lucy Bluett, an expert, said mobile phone use was a distraction (使人分心的事) to students during school hours. Teachers were also saying that sometimes students might use phone messages to cheat during exams.

    She said some schools had tried to ban mobile phones. Some parents felt unhappy because they couldn't call up their children.

    Many teachers said students should not have mobile phones at the school, but if there was a good reason, they could leave their phones at the school office.

    Many people say that they understand why parents would want their children to have phones, but they think schools should let the students know when they can use their mobile phones.

    The population is  1  fast．There will be more and more people in the world and most of them will live 2than before，because life will be better．3 will be much smaller and more useful，and there will be at least one in every home．And computer studies will be one of the important 4  for students at school．People will have more free time for sports and  5 TV．Travelling will also become  6   because of modern transportation(交通)．There will be changes in our food，too．More land will be used for building new towns and houses．Then there will be less room for cows and sheep，so  7  will be more expensive．Maybe no one will eat it every day．  8 ，they eat more vegetables and fruits．Maybe people will be healthier．Work in the future will be  9  ，too．Dangerous and hard work will be done by robots．Because of this，many people will 10  their jobs. This will also be a problem．