Can people change their skin color without suffering like pop king Michael Jackson? Perhaps yes. Scientists have found the gene that determines skin color.
The gene comes in two versions, one of which is found in 99 percent of Europeans. The other is found in 93 to 100 percent of Africans, researchers at Pennsylvania State University report in the latest issue of Science.
Scientists have changed the color of a dark-striped zebra-fish（斑马鱼） to uniform gold by inserting a version of the pigment (色素) gene into a young fish. As with humans, zebra-fish skin color is determined by pigment cells, which contain melanin (黑色素). The number, size and darkness of melanin per pigment cell determine skin color.
It appears that, like the golden zebra-fish, light-skinned Europeans also have a mutation (变异) in the gene for melanin production. This results in less pigmented skin.
However, Keith Cheng, leader of the research team, points out that the mutation is different in human and zebra-fish genes.
Humans acquired dark skin in Africa about 1.5 million years ago to protect bodies from ultra-violet rays of the sun (太阳光紫外线), which can cause skin cancer.
But when modern humans leave Africa to live in northern latitudes, they need more sunlight on their skin to produce vitamin D. So the related gene changes, according to Cheng.
Asians have the same version of the gene as Africans, so they probably acquired their light skin through the action of some other gene that affects skin color, said Cheng.
The new discovery could lead to medical treatments for skin cancer. It also could lead to research into ways to change skin color without damaging it like chemical treatment did on Michael Jackson.The passage mainly tells us that ________.
| A．people can not change their skin color without any pain |
| B．the new discovery could lead to research into ways to change skin color safely |
| C．pop king Michael Jackson often changed his skin color as he liked |
| D．scientists have found out that people’s skin color is determined by the gene |
It can be inferred from the passage that _____________.
| A．nowadays people who want to change their skin color have to suffer a lot from the damage caused by the chemical treatment |
| B．Europeans and Africans have the same gene |
| C．the new discovery could help to find medical treatments for skin cancer |
| D．there are two kinds of genes |
Scientists have done an experiment on a dark-striped zebra-fish in order to _____________.
| A．find the different genes of humans’ |
| B．prove the humans’ skin color is determined by the pigment gene |
| C．find out the reason why the Africans’ skin color is dark |
| D．find out the ways of changing people’s skin color |
The reason why Europeans are light-skinned is probably that _____________.
| A．they are born light-skinned people |
| B．light-skinned Europeans have mutation in the gene for melanin production |
| C．they have fewer activities outside |
| D．they pay much attention to protecting their skin |
The writer’s attitude towards the discovery is ______________.
| A．neutral | B．negative | C．positive | D．unconcerned |
About six years ago I was eating lunch in a restaurant in New York City when a woman and a young boy sat down at the next table, I couldn't help overhearing parts of their conversation. At one point the woman asked, “So, how have you been?” And the boy—who could not have been more than seven or eight years old—replied. “Frankly, I've been feeling a little depressed lately.”
This incident stuck in my mind because it confirmed my growing belief that children are changing. As far as I can remember, my friends and I didn't find out we were “depressed”, that is, in low spirits, until we were in high school.
Undoubtedly a change in children has increased steadily in recent years. Children don't seem childlike anymore. Children speak more like adults, dress more like adults and behave more like adults than they used to.
Whether this is good or bad is difficult to say, but it certainly is different. Childhood as it once was no longer exists. Why?
Human development depends not only on born biological states, but also on patterns of gaining social knowledge. Movement from one social role to another usually involves learning the secrets of the new social positions. Children have always been taught adult secrets, but slowly and in stages; traditionally, we tell sixth graders things we keep hidden from fifth graders.
In the last 30 years, however, a secret-revelation（揭示） machine has been equipped in 98 percent of American homes. It is called television. Television passes information to all viewers alike, whether they are children or adults. Unable to resist the temptation （诱惑）, many children turn their attention from printed texts to the less challenging, more attractive moving pictures.
Communication through print, as a matter of fact, allows for a great deal of control over the social information which children will gain. Children must read simple books before they can read complex materials.According to the author, feeling depressed is ____________.
| A．a sure sign of a mental problem in a child |
| B．a mental state present in all humans, including children |
| C．something that cannot be avoided in children's mental development |
| D．something hardly to be expected in a young child |
According to the author, that today's children seem adult-like results from ____________.
| A．the widespread influence of television |
| B．the poor arrangement of teaching content |
| C．the fast pace of human scientific development |
| D．the rising standard of living |
What does the author think of communication through print for children?
| A．It enables children to gain more social information. |
| B．It develops children's interest in reading and writing. |
| C．It helps children to read and write well. |
| D．It can control what children are to learn. |
What does the author think of the change in today's children?
| A．He feels their adult-like behavior is so funny. |
| B．He thinks the change worthy of note. |
| C．He considers it a rapid development. |
| D．He seems to be upset about it. |
第一节：（共15小题；每小题2分，满分30 分）
阅读下面的短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项，并在答题卡上将该项涂黑。
The American book Who Moved My Cheese has been a bestseller all over the world. It teaches people how to face changes in their lives. Now its author Spence Johnson has written a book just for teens. The book tells us that when facing change in our lives, like a new school or new friends, don't be afraid. Instead, use this change to make a better life. The book gives an example of a change at school. A school is changing from having two terms to three terms because there are too many students.
Several teens are talking about this. Most of them are unhappy and worried. But Chris is not. He laughs and tells a story about two mice, two “little people” and some cheese.
The four are in a maze looking for the cheese. Here, cheese means something important in life, like moving to a new class or getting into college. But they find the cheese is gone. The mice realize that they can’t change what has happened and have to find more cheese. This means finding different dreams. The little people, however, can’t do this. They are afraid of change so they find no cheese.
After Chris finishes the story, the friends understand one thing: to get more cheese, move in a new direction quickly. His friends understand how this can be used in the changes all teens face, such as doing well at school or having good relationships or just feeling good about yourself.The book Who Moved My Cheese is __________.
| A．written all over the world | B．read across the world |
| C．sold only in America | D．loved only by teens |
What does the text mainly discuss?
| A．Never change in our life. | B．Change whenever you like . |
| C．Change with the changes. | D．Pay attention to the changes, |
The underline word “four”（paragraph 3） refers to __________.
| A．mice and little people | B．students |
| C．cheese | D．readers |
In our lives, we should learn from __________.
| A．mice | B．little people |
| C．Chris | D．Spence Johnson |
One day, Jack’s parents told him that his grandpa would retire after working for forty years. Jack said in surprise, “I’m only seven, so it means Grandpa has been … er… A really long time!”
His parents said, “Yes. That’s why we are going to have a surprise party for him.”
Jack loved his Grandpa and wanted to do something special for him. He remembered the business card his grandpa had given him two years before. He knew that his grandpa would no longer have the position (职位) on that card, so he decided to build a new one for his grandpa.
When the big day came, Jack was ready. But he didn’t want to put his gift together with others’. He carried it around with him the whole evening.
When all the other people left, he took his grandpa’s hand and brought him over to a chair and gave him the gift.
His grandpa smiled, “Well, it must be a beautiful gift. May I open it now?” “Sure!” Jack said excitedly.
As Grandpa opened the gift, tears came into his eyes. Jack gave him the greatest gift he had ever got! They were business cards with his new position: FULL-TIME GRANDPA! Jack said, “Now your full-time job is my grandpa!”
“Well, how much do I get paid?” his grandpa asked, smiling. “As many hugs (拥抱) as you want!” With these words, Jack gave Grandpa a hug. “Well, I guess that means I’m the richest man in the world!” said Grandpa.Jack remembered _____ his grandpa had given him two years before.
| A．the birthday card | B．the toy |
| C．the book | D．the business card |
What did Jack decide to do for his grandpa?
| A．To build a new position for him. |
| B．To draw a picture for him. |
| C．To sing a song for him. |
| D．To buy a gift for him. |
Why were there tears in Grandpa’s eyes?
| A．Because he would lose his position. |
| B．Because he was not cared for. |
| C．Because he was moved by Jack’s gift. |
| D．Because he was unhappy. |
Birthdays often involve surprises. But this year's surprise on the birthday of the great British playwright William Shakespeare is surely one of the most dramatic.
On April 22, one day before his 441st birthday anniversary, experts discovered that one of the most recognizable portraits （画像）of William Shakespeare is a fake. This means that we no longer have a good idea of what Shakespeare looked like. “It's very possible that many pictures of Shakespeare might be unreliable because many of them are copies of this one,” said an expert from Britain's National Portrait Gallery.
The discovery comes after four months of testing using X-rays, ultraviolet light, microphotography and paint samples. The experts from the gallery say the image —commonly known as the “Flower portrait”— was actually painted in the 1800s, about two centuries after Shakespeare's death. The art experts who work at the gallery say they also used modern chemistry technology to check the paint on the picture. These checks found traces of paint dating from about 1814. Shakespeare died in 1616, and the date that appears on the portrait is 1609.
“We now think the portrait dates back to around 1818 to 1840. This was when there was a renewed interest in Shakespeare's plays,” Tarnya Cooper, the gallery's curator (馆长), told the Associated President.
The fake picture has often been used as a cover for collections of his plays. It is called the Flower portrait because one of its owners, Desmond Flower, gave it to the Royal Shakespeare Company.
“There have always been questions about the painting,” said David Howells, curator for the Royal Shakespeare Company. “Now we know the truth, we can put the image in its proper place in the history of Shakespearean portraiture.”
Two other images of Shakespeare, are also being studied as part of the investigation and the results will come out later this month.________.What makes the birthday of Shakespeare dramatic this year?
| A．It was found that he painted a portrait in 1814 instead of in 1609. |
| B．The Flower portrait has been found to be a fake. |
| C．Three portraits of Shakespeare are being tested to identify a real one. |
| D．It was found that there was a renewed interest in Shakespeare's plays around 1818 to 1840. |
Which statement is True according to the passage?
| A．Portraits of Shakespeare are all unreliable. |
| B．“Flower portrait” was a portrait of Shakespeare given to Desmond Flower. |
| C．1814 might be when the portrait was drawn. |
| D．The Flower portrait is not often used as a cover for Shakespeare's play. |
How many methods were used to test the portrait?
| A．Not mentioned. | B．Two |
| C．Three | D．At least four. |
The best title for this passage is ________.
| A．Birthdays often involve surprises |
| B．The surprise on the 441st birthday of Shakespeare |
| C．One portrait of Shakespeare is a fake |
| D．How can we know Shakespeare's appearance? |
Which is the best sentence to fill in the blank in the last paragraph?
| A．Soon we'll know which portrait is reliable. |
| B．Maybe we cannot find a real portrait of Shakespeare. |
| C．If the two portraits are found to be false, they will test more. |
| D．For now what Shakespeare really looked like will remain a mystery |
Among various programs, TV talk shows have covered every inch of space on daytime television. And anyone who watches them regularly knows that each one is different in style. But no two shows are more opposite in content（内容）, while at the same time standing out（突出） above the others, than the Jerry Springer and the Oprah Winfrey shows.
Jerry Springer could easily be considered the king of “rubbish talk”. The contents on his show are as surprising as can be. For example, the show takes the ever-common talk show titles of love, cheating, and hate, to a different level. Clearly, the Jerry Springer show is about the dark side of society, yet people are willing to eat up the troubles of other people’s lives.
Like Jerry Springer, Oprah Winfrey takes TV talk show to its top. But Oprah goes in the opposite direction. The show is mainly about the improvement of society and different quality of life. Contents are from teaching your children lessons, managing your work week, to getting to know your neighbors.
Compared to Oprah, the Jerry Springer show looks like poisonous waste being poured into society. Jerry ends every show with a “final word”. He makes a small speech about the entire idea of the show. Hopefully, this is the part where most people will learn something very valuable.
Although it is clean, the Oprah show is not for everyone. The show’s main viewers are middleclass（中产阶级） Americans. Most of these people have the time, money, and ability to deal with life’s tough problems. Jerry Springer, on the other hand, has more of a connection with the young adults of society. These are 18-to-21-year-olds whose main troubles in life include love, relationship, sex, money and drug. They are the ones who see some value and lessons to be learned through the show.Compared with other TV talk shows, both the Jerry Springer and the Oprah Winfrey are ___.
| A．more interesting | B．more popular |
| C．more detailed（详细的） | D．more formal |
Though the social problems Jerry Springer talks about appear unpleasant, people who watch the
shows_______.
| A．are interested in them. |
| B．have to accept them. |
| C．are cold to them. |
| D．are willing to get away from them. |
Which of the following is likely to be a topic of the Oprah Winfrey show?
| A．A murder | B．Nation hatred（憎恨） |
| C．Family income planning | D．Street accidents. |
We can learn from the passage that the two talk shows_____.
| A．have become the only ones of its kind. |
| B．talks about the weaknesses in human nature. |
| C．appear at different times of the day. |
| D．attract different people. |