It’s the lunchtime break at Shanghai Xianxia Middle School. No mobile phones can be heard ringing anywhere. The common sight of crowds of children chatting on their phones or sending short messages ha disappeared（消失）。

A grade-2 student said: “I couldn’t concentrate during classes if the phone was with me. I couldn’t help checking if there were messages or missed phone calls. I even played games on the phone sometimes.”

The school authorities say they feel the ban （禁令） is necessary to keep order in class. They even gave out an open letter to remind parents not to let their children bring mobile phones to school. More than 96 percent of parents say they welcome the school decision. The school is also flexible （灵活的） in implementing the ban. Those students who live far from school are allowed to bring mobile phones to call their parents. But they still have to turn them off in classrooms.

Medical experts （专家） have also welcomed the school decision. They say too much dependence on mobile phones can cause many psychological problems in teenage students.

1．The passage mainly tells us about      .

A．whether the mobile phone should be used at school by students

B．the harm the mobile phone may cause to middle school students

C．different opinions between school authorities and medical experts

D．a ban on the use of mobile phones by students in a middle school

2．What can we learn from Paragraph 1?

       A．Shanghai Xianxia Middle School is very crowded during lunchtime breaks

       B．No mobile phones can be heard any time at Shanghai Xianxia Middle School

       C．All the children with mobile phones usually disappear during lunchtime breaks

       D．Lots of students used to be busy using their mobile phones during lunchtime breaks

3．The grade-2 student thought that      .

       A．the mobile phone is helpful to his or her studies

       B．it is no good using the mobile phone at school

       C．the mobile phone should be kept on all the time

       D．it is good to play mobile phone games sometimes

4．In paragraph 3, the underlined world “implementing”means       in Chinese.

       A．调 整              B．公 布              C．执 行              D．张 贴

5．Which of the following is NOT true according to the passage?

       A．All the parents welcome the school decision

       B．Some students can bring mobile phones to school.

       C．Medical experts think the school decision is good

       D．No one is allowed to use mobile phones in classrooms.