问题补充：
Sydney Australia—Mobile phone has become a problem for middle schools. Some middle schools in Australia have banned students from carrying mobile phones during school hours.
Mobile phone use among children has become a problem for the school this year. Several children have got mobile phones as Christmas gifts, and more students want them.
Mary Bluett, an official, said mobile phone use is a distraction（分心的事）to students during school hours and it also gives teachers so much trouble in their classrooms. 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 get in touch with their children.
Many teachers said students should not have mobile phones at school, but if there was a good reason, they could leave their phones at school offices. They also said there were many reasons why the students should not have mobile phones at school: they were easy to lose and were a distraction from studies.
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.
【小题1】Some middle schools in Australia have banned students from carrying mobile phones.A．because they are studentsB．when they are freeC．when they are at schoolD．because they are young【小题2】We know from the passage that some children get mobile phones from.A．the makers and sellersB．some other strangersC．their parents and friendsD．some mobile phone users【小题3】Some parents felt unhappy because they couldn’t during school hours.A．use their mobile phonesB．leave their mobile phonesC．help the teachers with their workD．get in touch with their children【小题4】The underlined word “they” in the fifth paragraph refers to.A．many teachersB．some messagesC．mobile phonesD．some studentsC
答案：
(答案→)C
解析：这篇文章主要讲了澳大利亚悉尼的很多中学禁止学生在上课时间使用手机，并阐述了原因。
【小题1】根据Some middle schools in Australia have banned students from carrying mobile phones during school hours.故选C。
【小题2】根据Several children have got mobile phones as Christmas gifts, and more students want them.故答案应为C。
【小题3】根据Some parents felt unhappy because they couldn’t get in touch with their children，故选D。
【小题4】根据They also said there were many reasons why the students should not have mobile phones at school: they were easy to lose and were a distraction from studies.可知they指学生，故选D。
