题目内容：

Nowadays, more and more teenagers use smart phones, tablets and other mobile devices more than ever before. And the amount of time they spend on these devices is only likely to increase in the future. But are all these changes good?

We sometimes call children who are able to use mobile devices and technology easily digital natives. They can text, email, get Wi-Fi, and download. Some experts say that long periods of time spent chatting to friends online, playing video games and listening to mp3s, for example, may possibly change how their brains work.

Then there is the question of privacy. All this online activity creates a digital footprint. Every time we share a photo or a post on social media, and every time we search for something on the Internet, information about our activity is stored somewhere.

Our inability to control what happens to our children's digital footprint and their personal privacy has big possibilities. It might become normal for companies to ask their employees for their social media qualifications. We are also becoming more aware that companies and governments may be able to 'listen in' on our communications. So it is important to make our children aware of the possible results of over sharing.

Another area where the digital world may have a big effect is in education. One worry is that kids who spend a lot of time online at home are sometimes unable to socialize properly with other children when they are at school. Other experts point out that, when it comes to children and technology, the children are the experts, not the teachers. They say that we should stop seeing online as 'bad' and offline as 'good' and there is evidence of innovative work in some schools.

So, do we really need to rescue our children from the dangers of the digital world?

1. Which of the following can summarize the main idea of the text?

A. Do we need to rescue our kids from the digital world?

B. Should children learn to use digital technology?

C. Are there changes in children’s school life?

D. Should teachers accept changes in our life?

2.According to the second paragraph, what is the possible effect of digital childhood?

A. Children can grow up quickly.

B. Children can read texts fluently.

C. Children’s way of thinking may be changed.

D. Children may become mentally disabled.

3.All the following may happen to our digital footprints EXCEPT________

A. When surfing the Internet, our digital footprints are saved.

B. Some business societies may take advantage of the information.

C. Government may look into our communication through the Internet.

D. Digital pictures may be printed by our computer automatically.

4.Why are many teachers doubtful about digital technology?

A. Because some students can not do well in studies.

B. Because some teachers haven’t changed for years.

C. Because some students addicted to digital technology can not socialize well.

D. Because some teachers addicted to tradition technology cannot teach well.