阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。
By the end of the century, if not sooner, the world's oceans will be bluer and greener thanks to a warming climate, according to a new study.
At the heart of the phenomenon lie tiny marine microorganisms (海洋微生物) called phytoplankton. Because of the way light reflects off the organisms, these phytoplankton create colourful patterns at the ocean surface. Ocean colour varies from green to blue, depending on the type and concentration of phytoplankton. Climate change will fuel the growth of phytoplankton in some areas, while reducing it in other spots, leading to changes in the ocean's appearance.
Phytoplankton live at the ocean surface, where they pull carbon dioxide (二氧化碳) into the ocean while giving off oxygen. When these organisms die, they bury carbon in the deep ocean, an important process that helps to regulate the global climate. But phytoplankton are vulnerableto the ocean's warming trend. Warming changes key characteristics of the ocean and can affect phytoplankton growth, since they need not only sunlight and carbon dioxide to grow, but also nutrients.
Stephanie Dutkiewicz, a scientist in MIT's Center for Global Change Science, built a climate model that projects changes to the oceans throughout the century. In a world that warms up by 3℃, it found that multiple changes to the colour of the oceans would occur. The model projects that currently blue areas with little phytoplankton could become even bluer. But in some waters, such as those of the Arctic, a warming will make conditions riper for phytoplankton, and these areas will turn greener. "Not only are the quantities of phytoplankton in the ocean changing." she said, "but the type of phytoplankton is changing."
（1）What are the first two paragraphs mainly about?
| A． |
The various patterns at the ocean surface. |
| B． |
The cause of the changes in ocean colour. |
| C． |
The way light reflects off marine organisms. |
| D． |
The efforts to fuel the growth of phytoplankton. |
（2）What does the underlined word "vulnerable" in Paragraph 3 probably mean?
| A． |
Sensitive |
| B． |
Beneficial |
| C． |
Significant |
| D． |
Unnoticeable |
（3）What can we learn from the passage?
| A． |
Phytoplankton play a declining role in the marine ecosystem. |
| B． |
Dutkiewicz's model aims to project phytoplankton changes |
| C． |
Phytoplankton have been used to control global climate |
| D． |
Oceans with more phytoplankton may appear greener. |
（4）What is the main purpose of the passage?
| A． |
To assess the consequences of ocean colour changes |
| B． |
To analyse the composition of the ocean food chain |
| C． |
To explain the effects of climate change on oceans |
| D． |
To introduce a new method to study phytoplankton |
E
After a busy day of work and play, the body needs to rest. Sleep is necessary for good health. During this time, the body recovers from the activities of the day. The rest that you get while sleeping makes it possible for your body to prepare itself for the next day.
There are four levels of sleep, each being a little deeper than the one before. As you sleep, your body relaxes little by little. Your heart beats more slowly, and your brain slows down. After you reach the fourth level, your body shifts(变换) back and forth from one level to the other.
Although your mind slows down, you will dream from time to time. Scientists who study sleep point out that when dreaming occurs, your eyeballs begin to move more quickly (although your eyelids are closed). This stage of sleep is called REM, which stands for rapid eye movement.
If you have trouble falling asleep, some people recommend(建议) breathing very slowly and very deeply. Other people believe that drinking warm milk will make you drowsy. There is also an old suggestion that counting sheep will put you to sleep.
49. During REM, ______
A. you move restless B. you start dreaming
C. your mind stops working D. your eyeballs move quickly
50. A good title for this text might be_________
A. Dreams B. Sleep C. Good Health D. Work and Rest
D
In China, some radio broadcasting stations use hotlines to encourage listeners to take part in the talk shows.
That is a good idea. Yes, the fact is that some people do nothing but break the whole programme.
Some people know little about the topic under discussion. Sometimes they do not even know what the host is talking about. So the host has to tell the caller what the show is about. Usually the caller will ask a few questions which express his hope and show his ignorance(无知). Then the host has to answer and explain ---how silly it is! It wastes a lot of time.
It seems that some people phone the hotlines for fun. They just want to let the listeners hear them. They do not care what the topic is, whether they themselves are interested in the topic or how silly they appear to be.
It is necessary for radio stations to improve the hotline programmes. In my opinion, if a caller does not know what is going on, the operator should not let the caller take part in it.
47. The underlined sentence “some people do nothing but break the whole programme” may tell us that _____
A. radio stations use hotlines in a wrong way
B. there are problems to solve in the use of hotlines by some radio broadcasting stations
C. the use of hotlines by some radio broadcasting stations is a good idea
D. some people have unclear thoughts
48. The underlined word“operator” in the last paragraph refers to_____
A. 话务员 B. 听众 C. 医生 D. 主持人
C
Not many years ago, some American farmers began to complain about hawks(鹰). The hawks were killing chickens. The farmers did not know what to do. They went to the government officials and asked for help.
The officials said, “ We’ll pay you for each hawk you kill.” The farmers began to kill the hawks. Many hawks were killed, but the farmers now had another problem. The field mice were growing in number and they were eating up the farmers’ corn. Hawks eat not only chickens but also field mice. They eat more field mice than chickens. But if the farmers had known that, they would not have upset(打乱) the balance of nature. In one part of the USA, there are deer which eat a kind of wild rose. The deer are eaten by mountain lions. The number of deer, mountain lions, and wild rose does not change much if people stay away from them. If there are too many deer, mountain lions will increase rapidly in number and kill many deer. If there are too many mountain lions, there will be fewer deer and there will be more roses.
It is always necessary for us to keep the balance of nature. The government once killed almost all the mountain lions to protect the deer. Soon there were so many deer that they ate up all the wild roses. Then they began to eat the green leaves of young trees which were important to the farmers.
So the farmers protected their trees from the deer. The deer had nothing to eat, and many of them died.
The government learned a valuable lesson from nature.
44. What had happened after the hawks were killed?
A. People wouldn’t worry about their chickens.
B. The number of the field mice became too large.
C. The number of the field mice became small.
D. The field mice were eating up the farmers’ corn.
45. Why did American people have to protect their trees?
A. Because the mountain lions destroyed the trees.
B. Because there were so many deer that they began to eat the green leaves.
C. Because they wanted the trees to grow well.
D. Because the trees are more important than the deer.
46. What can we learn from the article?
A. We must keep the balance of nature.
B. We must not kill any animals.
C. we must feed the hawks with our corn to keep the balance of nature.
D. Both A and B.
B
Senior citizens are permitted to travel cheaply on a bus if they have a special card. Women may get cards when they are sixty.
Mrs. Matthews lives in the country but she went into town once a week to buy food and other things for the house, and she usually went by bus. She always had to pay the full price for her ride.
Then she reached the age of sixty and got her senior citizen’s card, but when she used it for the first time on the bus, it made her feel very old.
The bus driver had often seen her traveling on the bus before, and he notices that she was feeling unhappy, so after she had paid her money, he winked at her and whispered, “Don’t forget to give your mother’s card back to her when you see her again.”
Mrs. Matthews was very happy when she heard this.
40. Senior citizens in the story refer to _____.
A. those who have special cards
B. old people with special cards
C. people who hold high positions in the government
D. those who want to travel cheaply
41. Women over sixty______
A. don’t have to pay for taking buses
B. pay less for their ride if they have a special card
C. have to pay the full price for their ride
D. have to pay their special card
42. Mrs. Matthews felt unhappy on the bus because _______.
A. she still had to pay for the tide. B. the card wasn`t hers
C. she felt she was now an old woman D. the driver whispered to her
43. The driver whispered to her _______.
A. in order to make her feel younger
B. because he thought that she shouldn’t have borrowed her mother’s card
C. because he wanted her to pay the full amount
D. because he knew her mother was still alive.
第三部分：阅读理解（共15小题，满分30分）
阅读下面短文，从每题所给的四个选项中选出最佳选项。
A
As prices and building costs keep rising, the “do-it-yourself” (DIY) trend (趋势) in the U.S. continues to grow.
“We needed furniture(家具) for our living room.” C, “and we just didn’t have enough money to buy it. So we decided to try making a few tables and chairs.” John got married six months ago, and like many young people these days, they are struggling to make a home at a time when the cost of living is very high. The Rosses took a 2-week course for $ 280 at a night school. Now they build all their furniture and make repairs around the house.
Jim Hatfield has three boys and his wife died. He has a full-time job at home as well as in a shoe making factory. Last month, he received a car repair bill for $ 420. “I was deeply upset about it. Now I’ve finished a car repair course, I should be able to fix the car by myself.”
John and Jim are not unusual people. Most families in the country are doing everything they can to save money so they can fight the high cost of living. If you want to become a “do-it-yourself”, you can go to DIY classes. And for those who don’t have time to take a course, there are books that tell you how you can do things yourself.
36. We can learn from the text that many newly married people _______.
A. find it hard to pay for what they need
B. have to learn to make their own furniture.
C. take DIY courses run by the government.
D. seldom go to a department store to buy things
37. John and his wife went to evening classes to learn how to _____
A. run a DIY shop B. make or repair things
C. save time and money D. improve the quality of life.
38. When the writer says Jim has a full-time job at home, he means Jim ____
A. makes shoes in his home B. does extra work at night
C. does his own car and home repairsD. keeps house and looks after his children
39. Jim Hatfield decided to become a “do-it-yourself” when ____
A. his car repairs cost too much B. the car repair class was not helpful
C. he could no possible do two job D. he had to raise the children by himself