URBANA, ILL. (AP)--Mike dropped out of college to support his pregnant(怀孕的) girlfriend and now works as a manager of a trucking company, Lynn graduated with honors from Harvard University and was hired as a lawyer with a top law firm in a major city. What do these two people have in common? Ten years ago they were both high school valedictorians (致告别辞者).

A University of Illinois study follows the lives of 81 valedictorians and salutatorians (致词的学生代表) who graduated a decade ago from public and private high schools in the state.

Tales of Success and Failure

The study found tales of success and failure. The research on 46 women and 35 men found that some were doctors and scientists, one was a drug addict, another was a waitress with emotional problems.

"There is a popular idea about people who do well in school doing well in life," said Terry Denny, professor of education. Denny conducted the study with Karen Arnold, a former graduate student of Denny' s who is now a professor at Boston College. Denny and Arnold contacted the 81 students before graduation, and then followed up with interviews nearly every other year. They also sent them questionnaires in the mail.

Varied Careers

One-third of the students are lawyers, or have a doctorate. Nineteen are in business and 15 are engineers or computer scientists. Others include a farmer, a stock broker, and an aerobics instructor.

Arnold says many of the students have only average positions in the work world and that "most are not headed for greatness in their careers." Denny, however, says that it is too early to make such predictions. "Who expects someone to be on the Supreme Court at the age of 28 or to be the discoverer of an important scientific invention right after college?" he said. "These students are just getting started in life. They are just beginning to find out what life is all about."

1.What can we conclude from Paragraph 1?

2.According to the article Denny is probably older than Arnold because      .

3.What is probably the best title for the article?

4.Who probably wrote this article?

The family had lived ________ before, but the terrible traffic accident destroyed everything.

A．in common                            B．in danger

C．in place                               D．in peace

A breathtaking trick potentially left over from our ancestors might be found in us — the ability to sense oxygen through our skin.

Amphibians, animals such as frogs that can live both on land and in water, have long been known to be capable of breathing through their skin. In fact, the first known lungless frog that breathes only through its skin was discovered recently in the rivers of Borneo.

Now the same oxygen sensors found in frog skins and in the lungs of mammals (哺乳动物) have unexpectedly been discovered in the skin of mice.

“No one had ever looked,” explained Randall Johnson, a biologist researcher.

Mice and frogs are quite distant relatives, so the fact they have these molecules (分子) in common in their skin suggests they might well be found in the skin of other mammals, such as humans.

“We have no reason to think that they are not in the skin of people too,” Johnson said.   These molecules not only detect oxygen, but help increase levels of vital red blood cells, which carry oxygen around the body. Normal mice breathing in air that is 10 percent oxygen—a dangerously low level similar to conditions at the top of Mount Everest, and about half that of air at sea level. However, mice that had the oxygen sensor HIF-1a genetically removed from their skin failed to produce this hormone (荷尔蒙) even after hours of such low oxygen.

These findings, if they hold true in humans, suggest one could raise the level of oxygen circulating inside the body. This could help treat lung diseases and disorders such as anemia (贫血症) without injecting drugs, which make up a multibillion-dollar market, Johnson said.

Athletes also often try to get more oxygen delivered to their muscles in order to improve their performance. They often do this by training at high altitudes or in low-oxygen tents. The new study suggests they might want to expose their skin as well as breathing in low-oxygen air to improve their performance. “It’s hard to say what exactly might be done, however—there’s a lot we don’t know yet,” Johnson explained.

The scientists detailed their findings in the April 18 issue of the journal Cell.

49. Which of the following statements is TRUE according to the passage?

A. Johnson believes that Oxygen sensors also exist in human skin.

B. People have to surf the Internet to read detailed findings.

C. It has been proved that these findings help treat lung diseases.

D. It has long been expected oxygen sensors exist in mice’s skin. 

50. One of the functions of the molecules mentioned above is _______.

A. carrying oxygen around the body                   B. improving athletes’ performance

C. detecting oxygen                                          D. increasing level of oxygen

51. What is Johnson’s attitude to the application of the findings to the athletes’ training?

A. Negative                  B. Doubting                  C. Positive             D. Hesitating

52. The best title of the passage may be _______.

A. Great Findings Benefits Athletes A Lot

B. Frogs And Mice Are Distant Relatives

C. First Known Animal Breathes Through Skin

D. Humans Might Sense Oxygen Through Skin

If you keep practising every day, 　　　, you’ll find your spoken English improving.

Life affects friendships. As we grow, marry, fight in wars, move across the country or change jobs, old friendships fall away and new ones form. As long as we live, the things around us change, and as long as things change, friendships are affected.

When we were children we had best friends. No matter what happened we were still friends. We live our lives, however, and do what life calls for us to do, and as we get older, memories fade, faces blur, and even friends' names from childhood are forgotten.

Do you have a question about friendship? Do you wonder what to do with a friend who is no longer friendly? Perhaps you will see that you can't control others. If someone wants to be your friend, it is their choice. All you can do is treat them well and do the best for them when you are with them. Then you wish them well when they leave.

You can talk to old timers and they will tell you that life is full of incredible joy and incredible sorrow, and that what bothers you today will one day becomes a memory and the sting(痛苦) will be gone. Seniors might tell you that you will learn more as you get older. They will tell you that friendships come and friendships go. Sometimes when they go it will hurt, but you will be okay with it. It's the way life works, after all.

1.What can we learn about friendship, according to the text?

A．Friendship can not be easily affected by one's family.

B．Friends are always around us and will never go away.

C．Friends in childhood are the best no matter what happens.

D．Friends in childhood are sometimes forgotten by us.

2.What should we do with friends who are no longer friendly according to the  text?

A．Do our best to control them and make them listen to us.

B．Forget them and make new friends who have a lot in common with us.

C．Find the reason why our friendship has changed.

D．Care about them and do the best for them when we are together.

3.The text mainly tell us _________.

A．how to face the changes in friendship

B．how to deal with unfriendly people

C．that childhood friendship is valuable

D．how to share happiness with friends