题目内容：

    You’re walking around and a thought occurs: “I should check my phone.” The phone comes out of your pocket. You type a message. Then your eyes remain glued to the screen, even when you walk across the street. We all do this kind of distracted walking, or“twalking.”

Why are we so addicted to it? People are, by nature, information-seeking creatures. When we regularly check our phones, we are snacking on information from devices that offer an all-you-can-eat buffet of information. And in some ways, smartphones were designed to be irresistible to information-seeking creatures.

However, at what point is this considered addiction?

Not all constant phone use was considered addictive, said Steven Sussman, a professor at the University of Southern California. External pressures, like a demanding job, could force people to frequently check their phones. But when people check their devices just to enhance their mood, this could be a sign of a developing problem.

Another signal of addictive behavior is becoming preoccupied with smartphone use when you should be doing something else. An even clearer indicator is what happens when the phone is taken away.

“Let’s say you go out to the mountains and you don’t get reception, so you can’t use a smartphone,” Dr. Sussman said. “Do you feel a sense of relief? Or do you feel, wow, I want to get out of these mountains — I want to use the smartphone. If you feel the latter, that’s toward the addictive direction.”

Jim Steyer, the chief executive of Common Sense Media, said there needed to be a broad public awareness campaign over the dangers of walking and texting in parallel with distracted driving.“You have distracted pedestrians and distracted drivers, so it’s the double whammy,” he said. “Tech addiction hits in both ways.”

1.What is probably the proper explanation of the word “twalking”?

A.Talk while working.

B.Text while walking.

C.Travel while walking.

D.Tease others while walking.

2.Why do we get into the habit of twalking ?

A.Twaling is interesting and beneficial.

B.The news on the cellphone is of great value.

C.Twalking is trend that everyone want to follow.

D.Smartphones comply with our eagerness for information.

3.Which of the following is regarded as addition?

A.We use smartphones constantly for work.

B.When we use the smartphones, we are in a bad mood.

C.When smartphones are taken away, we are anxious to find them.

D.Climbing mountains without cellphone makes us feel a sense of relief.

4.What can be reflected from Jim Stever’s words?

A.Distracted driving is more dangerous than twalking.

B.Twalking brings more dangers than distracted driving.

C.The number of twalking people is equal to distracted drivers.

D.Twalking and distracted driving deserve more public concern.