Many people may not believe it, but this is what is happening: polar bears are dying out! They are dying because they are losing a great deal of habitat due to human incursion（侵入）and global warming. They are dying because of starvation as well. With the sea ice they depend on for survival shrinking, it is becoming increasingly difficult for them to find food.
An ecosystem is highly dependent on all of its parts, and removing even a single species can result in serious consequences. Polar bears are at the top of the predators（捕食性动物）where they live. They play an important part in the ecosystem. They feed on seals, fish and deer. Several other animals depend on the kill of polar bears. The failure to save polar bears might result in loss of these predators.
In addition, all large predators perform a very important function in their habitat: helping to control the populations of other species. When an animal group loses its natural predators, its population will rise rapidly, having a direct result in population decrease of other groups. A huge boom in population of Arctic seals would have a direct effect on the prey(捕食) of seals, and could reduce numbers of certain types of fish.
This could also have a direct effect on humans, who might have to compete with Arctic seals for food supplies from fish. Lack of polar bears could eventually affect human food supply. Human beings shall save polar bears to ensure the food supply.
There is no doubt that we should save polar bears. However, there is still another question: can they be saved? This is a matter that scientists debate because of rapid degradation（恶化）of the polar bear’ environment in recent years due to warming temperatures. It is estimated that if the bears cannot adapt to changing climates, they might die out before the end of the 21st century, with about 50% of the animals disappearing by 2050. So time is running out!
There are some things that may help slow down global warming and help delay extinction of polar bears. These include finding new energy sources that don’t give off greenhouse gases and not making any more incursions into polar bear’s territory.
Which is NOT the threat to the survival of polar bears according to the passage?
| A．Human’s killing. | B．Global warming. |
| C．Habitat loss. | D．Lack of food. |
Why do we need to save polar bears?
| A．For the predators in the ecosystem. |
| B．For the seals in Arctic Circle. |
| C．For our own source of food. |
| D．For our environment. |
If bears can’t adapt to changing climates, we will probably have lost _____ by the middle of the 21st century.
| A．half of polar bears |
| B．most of polar bears |
| C．90% of polar bears |
| D．all of polar bears |
We can infer that _____ .
| A．nothing can prevent the extinction of polar bears |
| B．drilling for oil in the Arctic should be encouraged |
| C．polar bears can surely adapt to changing climates |
| D．using solar energy is good for saving polar bears |
请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入最恰当的单词。注意：每空格1个单词。
A new set of brain images shows why: Reading the Roman alphabets and Chinese characters uses different parts of the brain.
The results also suggest that Chinese schoolchildren have reading problems in a different part of the brain used in reading alphabet-based languages. This shows that the learning disorder dyslexia ( inability to read properly) is not the same in very culture and does not have a universal biological cause.
Scientists described the results as “very important and revolutionary”. While dyslexia has certain common roots, they said, they now have some proof that this kind of functional problem works differently according to the different demands that Western and Eastern languages place on the brain.
Dyslexia is a common developmental disorder in which people of normal intelligence have difficulty learning to read, spell and master other language skills.
The results suggest that treating dyslexia around the world probably will require different treatments.
“Reading is complex,” said Guinevere Eden, Georgetown University professor. “This shows we need to be more open-minded about diverse treatment approaches.”
Its origins are complex. There appears to be a genetic aspect to the illness. It also may result from brain injury before birth that changes visual and hearing pathways in the brain.
Earlier brain scans show that English-reading dyslexics don’t function properly in a left part of the brain associated with the awareness of 44 sounds from the English alphabet. However, according to the new study, reading Chinese uses some different parts of the brain located in the left-front of the brain. It is associated with symbol interpretation. Unlike alphabet letters, Chinese characters represent entire thoughts and physical objects.
Dyslexia
| Definition |
a learning(1)______ in which people of average IQ find it (2)_____to learn to read and acquire other language skills |
| Origins |
Genetic causes or brain (3)______ before birth, which affects (4) and hearing abilities |
| Finding of the earlier study |
(5)_____reading dyslexics don’t function properly in a left part of the brain |
| Discovery of the new study |
Reading Chinese uses the(6) _____part of the brain |
| Conclusion |
Reading Roman alphabets and reading Chinese characters place different(7)____on the brain. Dyslexia is not the same in every(8) _____and does not have the same(9)_____roots. |
| (10)_______ |
Dyslexia needs to be treated in different ways |
It was a village in India. The people were poor. However, they were not unhappy. After all, their forefathers had lived in the same way for centuries.
Then one day. Some visitors from the city arrived. The told the villagers there were some people elsewhere who liked to eat frog’s legs. However, they did not have enough frogs of their own, and so they wanted to buy frogs from other place.
This seemed like money for nothing. There were millions of frogs in the fields around, and they were no use to the villagers. All they had to do was catch them. Agreement was reached, and the children were sent into the fields to catch frogs. Every week a truck arrived to collect the catch and hand over the money. For the first time, the people were able to dream of a batter future. But the dream didn’t last long.
The change was hardly noticed at first, but it seemed as if the crops were not doing so well. More worrying was that the children fell ill more often, and, there seemed to be more insects around lately.
The villagers decided that they couldn’t just wait to see the crops failing and the children getting weak. They would have to use the money earned to buy pesticides(杀虫剂) and medicines. Soon there was no money left.
Then the people realized what was happening. It was the frog. They hadn’t been useless. They had been doing an important job---eating insects. Now with so many frogs killed, the insects were increasing more rapidly. They were damaging the crops and spreading diseases.
Now, the people are still poor. But in the evenings they sit in the village square and listen to sounds of insects and frogs. These sounds of the night now have a much deeper meaning. From paragraph I we learn that the villagers __________.
| A．worked very hard for centuries |
| B．dreamed of having a better life |
| C．were poor but somewhat content |
| D．lived a different life from their forefathers |
Why did the villagers agree to sell frogs?
| A．the frogs were easy money |
| B．They needs money to buy medicine |
| C．they wanted to please the visitors |
| D．the frogs made too much noise |
What might be the cause of the children’s sickness?
| A．the crops didn’t do well |
| B．there were too many insects |
| C．the visits brought in diseases |
| D．the pesticides were overused |
What can we infer from the last sentence of the text?
| A．Happiness comes from peaceful life in the country |
| B．Health is more important than money |
| C．The harmony between man and nature is important |
| D．good old day will never be forgotten |
For many parents , raising a teenager is like fighting a long war ,but years go by without any clear winner. Like a border conflict between neighboring countries , the parent-teen war is about boundaries: Where is the line between what I control and what you do?
Both sides want peace, but neither feels it has any power to stop the conflict. In part, this is because neither is willing to admit any responsibility for starting it. From the parents’ point of view, the only cause of their fight is their adolescents’ complete unreasonableness. And of course，theteens see it in exactly the same way, except oppositely . Both feel trapped.
In this article， I’ll describe three no-win situations that commonly arise between teens and parents and then suggest some ways out of the trap. The first no-win situation is quarrels over unimportant things . Examples include the color of the teen’s hair, the cleanliness of the bedroom ,the preferred style of clothing , the child’s failure to eat a good breakfast before school, or his tendency to sleep until noon on the weekends .Second , blaming. The goal of a blaming battle is to make the other admit that his bad attitude is the reason why everything goes wrong. Third , needing to be right .It doesn’t matter what the topic is –politics. The laws of physics ,or the proper way to break an egg –the point of these arguments is to prove that you are right and the other person is wrong，for both wish to be considered an authority—someone who actually knows something — and therefore to command respect. Unfortunately , as long as long as parents and teens continue to assume that they know more than the other ,they’ll continue to fight these battles forever and never make any real progress. Why does the author compare the parent-teen war to a border conflict?
| A．Both can continue for generations. |
| B．Both are about where to draw the line |
| C．Neither has any clear winner |
| D．Neither can be put to an end |
What does the underlined part in Paragraph 2 mean?
| A．The teens blame their parents for starting the conflict. |
| B．The teens agree with their parents on the cause of the conflict |
| C．The teens accuse their parents of misleading them |
| D．The teens tend to have a full understanding of their parents |
Parents and teens want to be right because they want to ________.
| A．give orders to the other |
| B．know more than the other |
| C．gain respect from the other |
| D．get the other to behave properly |
What will the author most probably discuss in the paragraph that follows?
| A．Causes for the parent –teen conflicts |
| B．Examples of the parent –teen war. |
| C．Solutions for the parent –teen problems |
| D．Future of the parent-teen relationship |
How words came into being is unknown. All we assume（推测）is that some early men invented certain sounds, in one way or another, to express thoughts and feelings, actions and things, so that they could talk with each other. Later they agreed upon certain signs, called letters, which could be put together to show those sounds, and which could be written down. Those sounds, whether spoken or written in letters, are called words.
The power of words, then, lies in their associations-the things they bring up to our minds. Words become filled with meaning for us by experience; and the longer we live, the more certain words bring back to us the happy and sad events of our past; and the more we read and learn, the more the number of words that mean something to us increases.
Great writers are those who not only have great thoughts but also express these thoughts in words which have powerful effects on our minds and feelings. This clever use of words is what we call literary style（文体）.Above all, the real poet is a master of words. He can express his meaning in words which sing like music , and which by their position and association can move men to tears. We should therefore learn to choose our words carefully and use then correctly, or they will make our speech silly and common. We learn from the text that language might have begun with( ).
| A．expressions |
| B．actions |
| C．signs |
| D．sounds |
In the last paragraph, what does the author suggest that we should do?
| A．Use words skillfully . |
| B．Make musical speeches . |
| C．Learn poems by heart . |
| D．Associate with listeners |
When I was six, Dad brought home a dog one day, who was called “Brownie”. My brothers and I all loved Brownie and did different things with her. Ore of us would walk her, another would feed her, then there were baths, playing catch and many other games, Brownie, in return. loved each and every one of us. One thing that most touched my heart was that she would go to whoever was sick and just be with them we always felt better when she was around.
One day, as I was getting her food, she chewed up(咬破)one of Dad’s shoes, which had to be thrown away in the end. I knew Dad would be mad and I had to let her know what she did was wrong. When I looked at her and said, “Bad girl！” she looked down at the ground and then went and hid. I saw a tear in her eyes.
Brownie turned out to be more than just our family pet, she went everywhere with us .People would stop and ask if they could pet her. Of course she’d let anyone pet her. She was just the most lovable dog. There were many times when we’d be out walking and a small child would come over and pull pm her hair. she never barked(吠) or tried to get away. Funny thing is she would smile. This frightened people because they thought she was showing her teeth. Far from the truth, she loved everyone.
Now many years have passed since Brownie died of old age. I still miss days when she was with us. What would Brownie do when someone was ill in the family?
| A．Look at them sadly. |
| B．Keep them company. |
| C．Play games with them. |
| D．Touch them gently. |
We can infer from Paragraph 2 that Brownie__________.
| A．world eat anything when hungry |
| B．felt sorry for her mistake |
| C．loved playing hide-and-seek |
| D．disliked the author’s dad |
Why does the author say that Brownie was more than just a family pet?
| A．She was treated as a member of the family. |
| B．She played games with anyone she liked. |
| C．She was loved by everybody she met. |
| D．She went everywhere with the family. |
Some people got frightened by Brownie when she__________.
| A．smiled |
| B．barked |
| C．rushed to them |
| D．tried to be funny |
Which of the following best describes Brownie?
| A．Shy |
| B．Polite |
| C．Brave |
| D．Caring |