题目内容：

Teenagers around the world can be happy with the news that the brain will ignore parents’ order when they tap on their smartphones. A new scientific study from the University College London has shown that humans may temporarily go deaf when they’re focusing on something visual at the same time.

The researchers played the normal-volume sounds in the background. And 13 volunteers experienced inattentional deafness as their visual tasks became increasingly difficult. “We found that when volunteers were performing the demanding visual task, they were unable to hear sounds that they would normally hear,” Maria Chait said in a statement. “The brain scans showed that people didn’t filter out the sounds on purpose. They were not actually hearing them in the first place.”

The findings, published in the Journal of Neuroscience, suggest that the centre of sights and the center of sounds share limited resources. Inattentional deafness is a common everyday experience and the study explains why, according to UCL Institute of Cognitive Neuroscience Professor Nili Lavie.

If you try to talk to someone focusing on a book, game, or television program and don’t receive a response, they aren’t necessarily ignoring you. They simply might not hear you at all. This could also explain why you might not hear your bus or train stop being announced if you’re absorbed in your phone, book or newspaper. However, some loud sounds will still be able to break through.

Some situations could become potentially dangerous when the quieter ones go unheard. As you can imagine, in the operating room, when a doctor concentrates on his work, he might not hear the equipment beeping. It also applies to drivers who concentrate on complex directions. Fortunately, experts have given us some useful tips on preventing such situations.

1.What has the University College London found?

A. Teenagers like to play visual games.

B. Smartphones have a good effect on ears.

C. Teachers don’t allow students to use phones.

D. People can’t hear well while using their eyes..

2.What’s the attitude of Nili Lavie to the study?

A. Doubtful.    B. Negative.    C. Approving    D. Critical

3.What will you most probably hear if you are concentrating on a book?

A. Fire alarms.    B. Words from the TV.

C. What your parents say to you.    D. Announcement in the station.

4.What will the author probably talk about in the next paragraph?

A. How to become a good driver.

B. How to help improve hearing.

C. Situations related to deafness.

D. Advice for people with visual tasks.