【湖南省益阳市2015年中考英语试题】阅读下面两篇材料，从每题所给A、B、C三个选项中选出最佳答案。
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 (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 school, but if there was a good reason, they could leave their phones at 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.
Some middle schools in Australia have banned students from carrying mobile phones ______.
A．when they are at home 
B．when they are free
C．when they are at school
We know from the passage that some children get mobile phones from        .
A．the makers and sellers
B．the passers-by and strangers
C．their parents and friends
What does the underlined word “cheat” mean in the passage?
A．Behave dishonestly.
B．Behave honestly.
C．Behave correctly.
Some parents felt unhappy because they couldn’t ______ during school hours.
A．use their mobile phones
B．call up their children
C．help the teachers with their work
The passage tells us that ______.
A．students shouldn’t have mobile phones at school except for some special reasons
B．many people can’t understand why parents would want their children to have phones
C．all parents felt unhappy because they couldn’t use their phones at school