题目内容：

Here's something to consider：A recent study conducted by the

University of Michigan's

Transportation Research Institute found more teens are delaying getting their driver's licenses.

Teens and young adults would rather surf the Web and stay connected via smartphones and computers, than get out of the house.

A University of Michigan study found 31 percent of 16­year­olds had driver's licenses in 2008, compared to 46 percent in 1983.

The trend was also found in other age groups. For example, among 18­year­olds, the percentage with licenses dropped from 80 percent in 1983 to 65 percent in 2008.

Once, the great American teen dream was to own a car and leave mom and dad and hang out with friends. Not so much anymore.

Here's what Michael Sivak, a research professor involved in the university's study said, “It is possible that the availability of virtual contact through electronic means reduces the need for actual contact among young people. Besides, some young people feel that driving interferes with (干扰) texting and other electronic communication.”

Some other reasons young people aren't anxious to get behind the wheel: Many schools no longer offer driver training courses, so getting a license costs more. And graduated license requirements limit how many passengers a young person can carry, and the hours he or she can drive.

Much of this downturn happened before the Great Recession (不景气) began in 2008, so the costs of gas and car ownership cannot be pointed to as a cause.

There's no sign young people will do without car ownership as they get older, but even if deals are delayed a few years, there will be an effect on the economy. America is a country that depends greatly on the car.

And America has always been a country characterized by its willingness to be mobile, to head for places unexplored, to just get up and go.

Now, it seems we're willing to stay in and stare at a display while tapping out thoughts and messages. In­person interactivity is slowly being exchanged for Web­based interactivity.

What's really been lost is a sense of curiosity and adventure. How sad.

1.What can be the best title for the text?

A. Web­based interactivity is on the rise among teens

B. More young adults seldom get out of the house

C. Getting a license costs much more than before

D. Desire for freedom of road decreases in young

2.Michael Sivak mainly explains ________.

A. the differences between virtual contact and actual contact

B. the harmful effects of using electronic communication

C. why more teens are delaying getting their driver's

licenses

D. why more young people show much interest in driving

3.The trend's influence on America's economy can be described as ________.

A. beneficial    B. negative

C. slight    D. surprising

4.From the passage, we can infer that in the past Americans generally ________.

A. used mobile phone wherever they were

B. loved to go to unknown places

C. spent more time on the Internet

D. depended less on the car