A young man named Charles Lyell had different ideas. He wrote a book about them called Principles of Geology. The earth，according to Lyell，was not only thousands of years old，it was millions of years old. As to the common belief that changes in the earth’s surface happen suddenly because of a single earthquake or flood，he said that this might happen once in a while，but usually these changes took place very slowly. He believed that the surface of the earth had been changing from the beginning of time. The changes，he said，were caused by the long-term action of the winds and seas，and by forces such as volcanoes breaking out under the earth’s surface. Once in a great while he thought，a mountain might appear for the first time after an earthquake. But usually mountains would rise slowly and steadily.
Professor Henslow was interested in Lyell’s ideas，but he did not actually believe them. Charles Darwin could not make up his mind about them. But they set him thinking along lines which would later change the beliefs of thoughtful people all over the world.
At Cambridge，Charles Darwin studied just enough to pass the examination，and received his college degree in 1831.During this time，he had become more and more interested in geology. At the end of the school year，he went to North Wales with one of his teachers to examine the rock formations (构成) and to search for fossils. Fossils are the remains of ancient living things. They are usually found fixed in rocks in the earth’s crust (地壳). Fossils may be of animals，such as fish，insects，birds，or humans. They may be of plants from tiny leaves to huge trees.
When a living creature dies，it usually decays (腐烂)or is eaten by animals. However，if it sinks into a riverbed or is quickly covered by the blowing sands of a desert storm，the bones are kept up in the earth. Over many years the soft inner parts of a bone disappear，leaving the inside hollow. Water containing mineral enters into the hollow. Slowly the mineral hardens and makes the bone hard and heavy，like stone.
71.According to Charles Lyell，it is mainly that the earth has been formed like today’s shape.
A. from the beginning of time B. past some experiences of big flood
C. over a very long period of years D. because of several big earthquakes
72.Charles Lyell believed the fact that a mountain is formed .
A. more by seas than by volcanoes B. more slowly than suddenly
C. more by an earthquake than by winds D. more steadily than quickly
73.Unlike Professor Henslow，Charles Darwin .
A. never thought Lyell’s ideas were right
B. did made up his mind not to accept Lyell’s ideas
C. thought about what the world were then thinking about
D. thought over Lyell’s ideas and developed them
74.The main purpose of Darwin’s going to North Wales was to .
A. make a study of fossils
B. appreciate the rock formation
C. to do research work into dead animals
D. look for plants from tiny leaves to huge trees
75.In which order are fossils formed?
a. A living thing sinks into a riverbed or sands.
b. Water goes into a bone hollow together with mineral.
c. Something soft in a bone disappears.
d. The hardened mineral makes the bone hard.
e. The bone becomes hollow inside.
A.a b c d e B.c a b e d C.a c e b d D.e c d b a
An artist in Oakland, California is using his skills to help the homeless. Greg Kloehn builds very small shelters that make life on the streets more comfortable. The structures offer the homeless some safety and protection from bad weather. Each little house also has wheels on the bottom so it can go wherever its owner goes.
Greg Kloehn has given away at least 20 tiny houses to the homeless on the street. On a recent day, Mr. Kloehn stops to visit his homeless friends. One of them is Oscar Young. The two men hug when they see each other. Inside his little shelter Mr. Young gets relief from cold nights on the streets. Mr. Kloehn also visits Sweet-Pea, another friend who also lives in one of the little homes the artist built. She says it keeps her safe and protects her belongings.
In the mornings, Mr. Kloehn searches the streets for building materials. He gathers what he can and takes it to his studio. There, he puts the houses together. Empty coffee bags become roof material. A washing machine door and refrigerator part become windows. Nails, screws and the sticky glue hold all the pieces together. The artist also attaches a small electrical device(装置) to the house. The device is powered by the sun.
Some of the people living on the streets once had normal houses of their own. But some of the people say they have learned to live with less and they are thankful to that man.
Mr. Kloehn says his work is not a social project. He says he is just someone using his skills to help his homeless neighbors. The passage is likely to be taken from ________.
| A．a textbook | B．a book review |
| C．a science magazine | D．a news report |
The followings are the advantages of the small shelters EXCEPT________.
| A．saving power and energy |
| B．protecting belongings of the homeless |
| C．decorating the streets where they are |
| D．keeping the homeless safe and comfortable |
We can learn from the passage that ________.
| A．the shelters can’t be removed |
| B．the homeless don’t like the shelters |
| C．Greg Kloehn has sold at least 20 tiny houses |
| D．an act of kindness has made people simple and grateful |
What’s the main idea of the passage?
| A．A successful social project in Oakland. |
| B．An artist creates homes for the homeless. |
| C．A more comfortable shelter on the streets. |
| D．An artist makes a living by designing small shelters. |
For my brother and I, mowing(割草) yards during the summer is a good way to earn pocket change. Dad was our salesman. He traded our service to neighbors at a low price they could not refuse. My brother and I got $10 per yard. However, I later found out our competitors were charging $ 20 or more for the same amount of work.
One afternoon we were cutting our neighbor’s yard. When I was finishing up, I was tired and sweaty. I pictured the tall glass of icy drink I would have to cool down soon. I was just about to cut off the lawn mower when I saw Dad pointing to one piece. I thought about the poor change I was getting paid for cutting grass so high that it almost broke the mower. I ignored him and kept walking. Dad called me out, “You missed a piece.”
I frowned (皱眉), hoping he would let me slide and go home. He kept pointing. So angry, I went back to cut that piece of grass. I said to myself, “That one piece isn’t hurting anyone. Why won’t he just let it go?”
But when I became an adult, I understood his message: When you are running a business, the work you do says a great deal about you. If you want to be seen as a businessman with honesty, you must deliver a quality product. That single piece of grass meant the job was not done.
Other neighbors took notice of the good work we did and we soon got more business. We started out with one client(客户), but by the end of the summer we had five.
The lesson my dad taught me stayed with me: If you say you are going to perform a job at a certain time, keep your word. Give your customers the kind of service you would like to receive. It shows how sincere you are and how much pride you take in your work.Which of the following statement is true?
| A．His father was not a good businessman. |
| B．His father charged more for his service. |
| C．His father’s service was good but cheap. |
| D．His neighbors thought their service was poor. |
When Dad asked the writer to go back, the writer felt ___________.
| A．doubtful | B．surprised |
| C．terrified | D．annoyed |
What did Dad teach the writer?
A. To do your work as well as possible.
B. To earn as much money as possible.
C. To get as more business as possible. The best title for the passage may be ___________.
| A．The Memory of My Childhood |
| B．The Lesson from My Dad |
| C．The Yard of Our Neighbor |
| D．The Grass Cutting days |
A new study suggests that the more teenagers watch television, the more likely they are to develop depression (抑郁) as young adults. But the extent to which TV may be to blame is a question that the study leaves unanswered.
The researchers used a national long term survey of adolescent health to investigate the relationship between media use and depression. They based their findings on more than 4, 000 adolescents who were not depressed when the survey began in 1995.
As part of the survey, the young people were asked how many hours of television or videos they watched daily. They were also asked how often they played computer games and listened to the radio.
Media use totaled an average of 5 and one half hours a day. More than 2 hours of that was spent watching TV.
7 years later, in 2002, more than 7 percent of the young people had signs of depression. The average age at that time was 21.
Brian Primack at the University of Pittsburgh Medical School was the lead author of the new study. He says every extra hour of television meant an 8 percent increase in the chances of developing signs of depression.
The researchers say they did not find any such relationship with the use of other media such as movies, video games or radio. But the study did find that young men were more likely than young women to develop depression given the same amount of media use.
Doctor Primack says the study did not explore why watching TV causes depression. But one possibility, he says, is that it may take time away from activities that could help prevent depression, like sports and socializing. It might also interfere with sleep, he says, and that could have an influence.
The study was just published in the Archives of General Psychiatry.
In December, the journal Social Indicators Research published a study of activities that help lead to happy lives. Sociologists from the University of Maryland found that people who describe themselves as happy spend less time watching television than unhappy people. The study found that happy people are more likely to be socially active, to read, to attend religious services and to vote.According to the first paragraph, what remains unsolved in the new study?
| A．Who is more likely to be influenced by TV. |
| B．How much teenagers are depressed by TV. |
| C．Whether teenagers are influenced by TV. |
| D．What should be done to help the teenagers. |
What can be inferred from the seventh paragraph?
| A．Depression is not related to the use of other media than TV. |
| B．Every extra hour of media use increases the chance of depression. |
| C．Longer use of media other than TV doesn't increase the chance of depression. |
| D．The influence of movies, video games and radio on depression varies respectively. |
The study done by the sociologists from the University of Maryland was mainly intended to __________.
| A．tell the difference between happy and unhappy people |
| B．prove the relationship between TV and depression |
| C．stress the importance of being socially active |
| D．provide a happy recipe (秘方) for all people |
Each new school year brings fresh reminders of what educators call the summer learning gap. Some call it the summer learning setback. Put simply, it means the longer kids are out of school, the more they forget. The only thing they might gain is weight. Recent studies show that children gain weight more quickly in the summer vacation than when they are in school.
Most American schools follow a traditional nine-month calendar. Students get winter and spring breaks and about ten weeks of summer vacation. Some schools follow a year round calendar. They hold classes for about eight weeks at a time, with a few weeks off in between. But many experts point out that the number of class days in a year-round school is generally the same as in a traditional school.
Last year, a study at Ohio State University reported that year-round students did not learn any more than other students. Lead researcher Paul von Hippel said "year-round schools don't really solve the problem of the summer learning setback. They simply spread it out across the year".
Across the country, research shows that students from poor families fall farther behind over the summer vacation than other students. Experts say this can be prevented. They note that many schools and local governments offer the programs that can help.
But calling them "summer schools" could be a problem. The director of the summer learning center at Johns Hopkins, Ron Fairchild, recently wrote about this issue on his blog.
He said that in American culture, the idea of summer vacation is connected to the beliefs about freedom and the joys of childhood. He said research with groups of different parents in Chicago and Baltimore found that almost all strongly disliked the term summer school. They said it created an image of children being forced to do work they missed during the school year.Which of the following is the, result of the long summer vacation?
| A．Kids become much stronger. |
| B．More kids drop out of school. |
| C．Kids become poor in learning. |
| D．Kids take part in all kinds of activities. |
Some American schools have their vacations __________.
| A．every two months |
| B．every few weeks |
| C．every three months |
| D．every four months |
The study at Ohio State University suggests that __________.
| A．the traditional calendar is better than the year-round one |
| B．the year-round calendar is better than the traditional one |
| C．the traditional calendar is as bad as the year-round one |
| D．the year-round calendar is the same as the traditional one |
According to American culture, during the summer vacation kids __________.
| A．should try their best to improve their lessons |
| B．must choose to take part in one of the programs |
| C．should do what they like and enjoy themselves |
| D．must be forced to make up for their poor lessons |
What exactly are white lions? "They are a color variation of regular lions," says William Swanson, director of animal research at the Cincinnati Zoo, in Ohio.
White lions are the result of a rare color gene mutation (变异). When both a male and a female lion carry the same white genes, there is a good chance that one or more of their cubs (幼兽) will be born with white fur.
Not many lions carry the white mutation. In nature, it's rare. A mutation can make an animal's survival more difficult. For example, being white makes it harder for the animal to mix with itssurroundings. Mutations also can cause physical problems, so those animals generally do not survive long enough to reproduce.
But sometimes white lion cubs are born among wild lions, especially in two areas of South Africa.
In 1975 two white cubs were spotted in the wild in South African reserve. They were seized and sent to a zoo. Today about 500 cubs of those two white lions and a few others known to have the white color gene live around the world in zoos, circuses, farms and private preserves.
White lions may be extremely rare in the wild, but breeders (饲养动物的人) know how to create more of them. This has created serious concern and debate.
White lions continue to exist only because they are inbred by people—fathers and daughters, sisters and brothers. Scientists worry that it also will cause health issues for white lions.
Inbreeding to create white lions as moneymaking attractions is only one concern. Another concern is that some people want to release captive-bred (人工繁殖的) white lions into the wild in South Africa to restore balance to the ecosystem. However, not everyone agrees that releasing these white lions into the wild is a good idea. Dan York of Hillsdale College has been studying white lion genetics and is worried. He says that because so many of today's white lions are inbred, it could spread health problems. If they breed with wild lions, they'll pass on the genetic problems to the wild population.
Instead of releasing captive-bred white lions, York suggests that South Africa concentrate on protecting all of its wild lions. That would ensure the safety of the wild population of lions, which may produce healthy white cubs in the future.It's difficult for a white lion to survive because __________.
a. its fur contrasts sharply with the surroundings
b. the mutation may cause physical problems
c. it is likely to be attacked by wild lions
d. it is hunted by human beings
| A．a, b |
| B．a, d |
| C．a, c |
| D．b, d |
What does the underlined word "inbred" inParagraph 7 probably mean?
| A．kept in enclosed space and unable to run away |
| B．bred in human-controlled environments with restricted settings |
| C．produced by breeding among closely related members |
| D．born among wild lions and kept in the zoo |
One of the reasons for inbreeding white lions is that __________.
| A．they can bring people a profit |
| B．their fur can be of great use |
| C．people want to keep white lions as pets |
| D．people want to study the genes of white lions |
Which of the following agrees with Dan York's opinion?
| A．It's useless studying white lion genetics. |
| B．White lion cubs born among wild lions are more healthy than captive-bred ones. |
| C．White lions shouldn't be kept in zoos or circuses. |
| D．The ecosystem in South Africa is being seriously damaged. |