Most mobile phone companies design（设计）models especially for children. But parents are usually the ones buying the phones, and paying the phones. According to a study, 56% of parents of children aged 8 to 12 have given their children a mobile phone. Most children get their first mobile phone at the age of 12.
Many parents think it’s necessary for children to have a mobile phone because it helps children stay in touch with their friends and families. They believe that mobile phones are an important tool when something happens suddenly. Children can stay connected with their parents at all times. Some people think mobile phones help teach children to be responsible.
But other people are worried about the health and safety of children’s mobile phones. They believe that sending messages while doing homework is bad for children’s concentration（注意力）. They say that children are spending too much time sending messages instead of talking to each other. But we do need to communicate face to face. Also, the radiation（辐射）that the mobile phones give off can be harmful to young people.
What do you think? If you have any idea about it, please tell me.
根据短文内容，选择正确答案。
According to the passage, most children got their first mobile phone         .
A. at the age of 12
B. at the age of 10
C. at the age of 8
Many parents think it’s necessary for children to have a mobile because          .
A. it’s cheaper than before
B. it helps children stay in touch with their friends and families
C. it’s a great birthday present
When something happens suddenly, mobile phones are ________ to stay touch with others.
A. a useful language
B. an important tool
C. a different way
The underline word “responsible” means “        ” in Chinese.
A. 负责任的 B. 乐于助人的 C. 尊重人的
Which is NOT TRUE according to this passage?
A. Some especial mobile phones are designed for children.
B. Some people think that sending messages while doing homework is a bad habit.
C. 56% of children aged 8 to 12 paid for their mobile phones.