阅读理解。 Mobile phone has become a problem for high schools. Some high-school students in Australia are not allowed to carry mobile phones during school hours. Mobile phone used among children has become a problem for the school years. Several children have got mobile phones as Christmas presents, and more students will want them. Marry Brown, a headmaster, said that mobile phone was a distraction (分心事) to students during school hours and it also gave 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 (禁止) 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 there was a good reason that they could leave their phones at school offices. They also said they were easily lost and were a distraction for 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. 1. Some high schools in Australia have stopped students from carrying mobile phones . [     ] A. because they are students B. when they are free C. when they are at school D. because they are children 2. What does the word 'cheat' mean in Chinese in this passage? [     ] A. 聊天 B. 核对 C. 查询 D. 作弊 3. Some children get mobile phones from as presents. [     ] A. the makers and sellers B. the passers-by and strangers C. their parents and friends D. some mobile phone user 4. Some parents felt unhappy because they couldn't during school hours. [     ] A. use their mobile phones B. leave their mobile phones in the school office C. help the teachers with their work D. get in touch with their children 5. The passage tells us that . [     ] A. students shouldn't have mobile phones at school except for some special reasons B. it is important to ban students from using mobile phones at school C. some parents felt unhappy because they couldn't use their phones at home D. parents should teach their children how to use mobile phones during school hours