单选题It can be concluded from the study that __________.
A． the bilingual speakers perform worse than those who only know one language
B． learning a language may have the risk of Alzheimer' s disease or smoking habits
C． people have to speak a new language fluently in order to gain some benefits
D． people can start to learn a new language later in life and still get the benefits
推断题。短文最后一段末句指出The results actually make a very compelling point you don’t have to be A fluent speaker of a language to get the benefits，and you can start later in life，too．即学习一门语言，你不必说得很流利，大脑也可以受益，并且，你完全可以晚一些再学习新的语言。故选项D正确。
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1The text mainly discusses __________.
A． bilingual education in schools
B． how to learn a new language
C． the best time to learn a new language
D． advantages of learning a new language
2Questions are based on the following passage.
Bill Gates was 20 years old. Steve Jobs was 21. Warren Buffett was 26. Ralph Lauren was 28.
These now iconic (偶像的) names were all 20-somethings when they started their companies
that would throw them, and their enterprises, into some of the biggest successes ever known. Consider this: many of the truly remarkable innovations of the latest generation--a list that includes Google, Facebook and Twitter--were all founded by people under 30.
So what is it about that youthful decade after those awkward teenage years that inspires such shoot-for-the-moon success? Does age really have something to do with it? It does. Young people bring fresh eyes to confronting problems and challenges that others have given up on.20-something entrepreneurs see no boundaries and see no limits. And they can make change happen. Peter Thiel, the co-founder of PayPal, has another, colder theory that may explain it: Ultimately, it' s about money.
In other words, it' s the young people who have nothing to lose, with no mortgage and, frankly, with nothing to do on a Friday night except work, who are the ones often willing to take the biggest risks. Sure, they are talented. But it' s their persistence and zeal ( 激情 ), the desire to stay up until 6 a.m. chugging Red Bull, that is the difference between being a salaried employee and an entrepreneur.
That' s not to say that most 20-somethings are finding success. They' re not. The latest crop of ûber successful young entrepreneurs, designers and authors are far, far from the norm In troth, unemployment for workers age 16 to 24 is double the national average.
One of the biggest challenges facing this next generation--and one that may prevent more visionary entrepreneurs from succeeding--is the staggering rise in the level of debt college students have been left with. If Peter Thiel' s theory is right, it is going to be harder and harder for young people to take big risks because they will be crushed with obligations before they even begin.
If you're over 29 years old and still haven't made your world-changing mark, don't despair.Some older people have had big breakthroughs, too. Thomas Edison didn't invent the phonograph( 留声机)until he was 30.
The first paragraph is used to show __________.
A． various famous men
B． the age of founders
C． the success of enterprises
D． the success of 20-somethings
