The gray-haired lady can’t wait to leave the building to search for her dad. Unless watched, she will walk in the streets in an effort to find her father, who died 30 years ago.
Not all cases of Alzheimer’s disease look like this, but Alzheimer’s is a serious disease that is said to be the fourth or fifth leading cause of death for people over age 75.
It is said that about three percent of the U.S. population over age 65 have Alzheimer’s. In the early stages, people may show short term memory loss. Some may experience changes in personality, easy to be angry. As the disease progresses, patients might lose the ability to move and may be unable to speak or move at all. This progressive disease generally lasts 8 to 10 years before
death occurs.
While no one is certain what causes these changes in the brain’s nerve fibers (神经纤维),their effect is certain. Alzheimer’s destroys not only the patients, but also spouses（配偶）, friends and families.
What should you do if you notice progressive memory loss in yourself or a loved one? Have the person examined by a doctor who is a specialist in the treatment of Alzheimer’s disease. Though many reasons other than Alzheimer’s disease may cause memory loss, its early symptoms and treatment may delay some of the most serious effects.
What feeling will you likely experience should a loved one suffer from Alzheimer’s disease? A person will often go through the various stages of sadness, shock, anger, and so on. If the spouse develops the disease, you may experience hurt and disappointment when he or she doesn’
t remember you are married.
Life for the Alzheimer’s patients and their loved ones will never be the same as the disease progresses, bringing a deep sorrow, loss and even anger towards God. No matter what feelings are present, facing them honestly will serve one better than burying them.
64. What can be inferred from the passage about the gray-haired lady?
A. She has been living with her father.
B. She was sad about the death of her father.
C. She can’t search for her father
without being watched.
D. She suffers from Alzheimer’s disease.
65. When people suffer from Alzheimer’s 
disease, _______.
A. their families and friends will suffer from the same disease
B. their families and friends will experience mental sufferings
C. they will certainly die in 8 to 10 years
D. they will forget everybody but their spouses
66. Memory loss occurs _______.
A. from Alzheimer’s disease and nothing else
B. from sadness, shock, anger, and so on
C. for a number of reasons
D. with changes in personality
67. From the passage we know that _______.
A. early treatment may stop Alzheimer’s disease occurring
B. it is still unknown what causes the changes in the brain’s nerve fibers
C. nerve fibers in the brain will cause Alzheimer’s disease
D. when one suffers from Alzheimer’s disease, he will be buried
Olaf Stapledon wrote a book called First and Last Men, in which he looked millions of years ahead. He told of different men and of strange civilizations（文明），broken up by long "dark ages" in between. In his view, what is called the present time is no more than a moment in human history and we are just the First Men. In 2，000 million years from now there will be the Eighteenth or Last Men.
However, most of our ideas about the future are really very short-sighted. Perhaps we can see some possibilities for the next fifty years. But the next hundred? The next thousand? The next million? That's much more difficult.
When men and women lived by hunting 50，000 years ago, how could they even begin to picture modern life? Yet to men of 50，000years from now, we may seem as primitive（原始的）in our ideas as the Stone-Age hunters do to us. Perhaps they will spend their days gollocking to make new spundels, or struggling with their ballalators through the cribe. These words, which I have just made up, have to stand for things and ideas that we simply can't think of.
So why bother even to try imagining life far in the future? Here are two reasons. First, unless we remember how short our own lives are compared with the whole human history, we are likely to think our own interests are much more important than they really are. If we make the earth a poor place to live on because we are careless or greedy （贪婪）or quarrelsome, our grandchildren will not bother to think of excuses for us.
Second, by trying to escape from present interests and imagine life far in the future, we may arrive at quite fresh ideas that we can use ourselves. For example, if we imagine that in the future men may give up farming, we can think of trying it now. So set your imagination free when you think about the future. A particular mention made of Stapledon's book in the opening paragraph __________.
| A．serves as a description of human history |
| B．serves as an introduction to the discussion |
| C．shows a disagreement of views |
| D．shows the popularity of the book |
The text discusses men and women 50，000 years ago and 50，000 years from now in order to show that __________.
| A．human history is extremely long |
| B．life has changed a great deal |
| C．it is useless to plan for the next 50 years |
| D．it is difficult to tell what will happen in the future |
Spundels and ballalators are used in the text to refer to __________.
| A．tools used in farming |
| B．ideas about modern life |
| C．unknown things in the future |
| D．hunting skills in the Stone Age |
According to the writer of the text, imagining the future will __________.
| A．serve the interests of the present and future generations |
| B．enable us to better understand human history |
| C．help us to improve farming |
| D．make life worth living |
Welcome to your future life ！
You get up in the morning and look into the mirror. Your face is firm and young-looking. In 2035，medical technology is better than ever. Many people your age could live to be 150，so at 40，you're not old at all. And your parents just had an anti-aging（抗衰老的） treatment. Now, all three of you look the same age!
You say to your shirt，"Turn red. "It changes from blue to red. In 2035，" smart clothes" contain particles（粒子）much smaller than the cells in your body. The particles can be programmed to change your clothes' color or pattern.
You walk into the kitchen. You pick up the milk, but a voice says，" You shouldn't drink that ！" Your fridge has read the chip （芯片）that contains information about the milk, and it knows the milk is old. In 2035，every article of food in the grocery store has such a chip.
It's time to go to work. In 2035，cars drive themselves. Just tell your" smart car" where to go. On the way, you can call a friend using your jacket sleeve. Such " smart technology" is all around you.
So will all these things come true? "For new technology to succeed，" says scientist Andrew Zolli，" it has to be so much better that it replaces what we have already. " The Internet is one example-what will be the next? We can learn from the text that in the future __________.
| A．people will never get old |
| B．everyone will look the same |
| C．red will be the most popular color |
| D．clothes will be able to change their pattern |
What can be inferred from Paragraph 4?
| A．Milk will be harmful to health. |
| B．More drinks will be available for sale. |
| C．Food in the grocery store will carry electronic information. |
| D．Milk in the grocery store will stay fresh much longer. |
Which of the following is mentioned in the text?
| A．Nothing can replace the Internet. |
| B．Fridges will know what people need. |
| C．Jacket sleeves can be used as a guide. |
| D．Cars will be able to drive automatically. |
What is the text mainly about?
| A．Food and clothing in 2035. |
| B．Future technology in everyday life. |
| C．Medical treatments of the future. |
| D．The reasons for the success of new technology. |
A black hole is created when a large star burns out. Like our sun, stars are unbelievably hot furnaces（熔炉）that burn their own matter as fuel. When most of the fuel is used up, the star begins to die.
The death of a star is not a quiet event. First there is a huge explosion. As its outer layer is blasted off into space, the dying star shines as brightly as a billion suns.
After the explosion gravity pulls in what's left of the star. As the outside of the star sinks toward the center, the star gets smaller and smaller. The material the star is made of becomes tightly packed together. A star is so dense that a teaspoon of matter from it weighs billion of pounds.
The more the star shrinks, the stronger the gravity inside it becomes. Soon the star is very tiny, and the gravity pulling it in is un-believably strong. In fact, the gravity is so strong that it even pulls light into the star! Since all the light is pulled in, none can go out. The star becomes black when there is no light. Then a black hole is born!
That's what we know about black holes. What we don't know is this ： What happens inside a black hole after the star has been squeezed into a tiny ball? Does it keep getting smaller and smaller forever? Such a possibility is hard to imagine.
But if the black hole doesn't keep shrinking, what happens to it? Some scientists think black holes are like doorways to another world. They say that as the star disappears from our universe, it goes into another universe. In other words a black hole in our universe could turn into a " white hole" in a different universe. As the black hole swallows light, the white hole shines brightly-somewhere else. But where? A different place, perhaps, or a different time-many years in the past or future.
Could you travel through a black hole? Right now, no. Nothing we know of could go into a black hole without being crushed. So far the time being, black holes must remain a mystery.
Black holes are a mystery-but that hasn't stopped scientists from dreaming about them. One scientist suggested that in the future we might make use of the power of black holes. They would supply all of Earth's energy needs, with plenty to spare. Another scientist wondered if a black hole could some day be used to swallow earthly waste-a sort of huge waste disposal（处理）in the sky! When the star begins to die __________.
| A．there is no fuel left in it |
| B．its outer layer goes into space first |
| C．a huge explosion will happen |
| D．it doesn't give off light any longer |
Which of the following doesn't help produce a black hole?
| A．The gravity inside the star is very strong. |
| B．The light can't go out of the star. |
| C．The star becomes smaller and smaller |
| D．The dying star shines very brightly. |
The black hole __________.
| A．continues becoming smaller and smaller all the time |
| B．goes into another universe and becomes a white hole |
| C．can pull in everything we know of in the world |
| D．will appear at another place at a different time |
The author mainly intended to tell us __________.
| A．New Scientific Discovery ： Black Holes |
| B．How Black Holes Came Into Being |
| C．What Black Holes Are |
| D．Travel Through A Black Hole |
Calling the future
When American inventor Alexander Graham Bell invented the telephone in 1876，it was a revolution in communication. For the first time, people could talk to each other over great distances. Over the last two decades a new means of spoken communication has appeared ：the mobile phone.
The mobile phone is like a two-way radio. But the two-way radio is a limited means of communication. As soon as the users move out of range of each other's broadcast area, the signal is lost. In the 1940s, researchers experimented with the idea of using a number of radio masts（无线电杆）to pick up signals from two-way radios. A caller would always be within range of one of the masts. When he or she moved too far away from one mast, the next mast would pick up the signal. （Scientists referred to each mast's reception area as being a "cell". This is why in many countries mo-bile phones are called "cellphones".）
However，1940s, technology was just at the beginning. The "mobile phones" were huge boxes. They had to be moved by car.
The first real mobile telephone call was made in 1973 by Dr Martin Cooper. As soon as his invention was complete, he tested it by calling a rival （竞争对手）scientist to announce his success. Within a decade, mobile phones became available to the public.
They have changed the way we do a lot of things. One powerful feature is: the short message service（SMS） or text message. It's the perfect communication method for the busy modern lifestyle. The text message has changed the way we write in English. The language construction became more lax （松散的）. Traditional rules of grammar and spelling are much less important.
Over the last few years mobiles have become more and more advanced. We have seen the introduction of cameras, global positioning system and Internet access.
Alexander Graham Bell would be surprised if he could see how far the science of the telephone has developed in less than 150years. If he were around today, he might say ： " That's gr8! But I'm v busy rite now. Will call U 2nite. " The article is written to __________.
| A．warn people of the possible risks in using mobile phones |
| B．inform readers of the history and development of mobile phones |
| C．convince people of the uses of mobile phones |
| D．predict the applications of mobile phones |
What's the CORRECT time order about the development of communication?
a. the telephone invented by Alexander Graham Bell
b. "mobile phones" with very large boxes
c. mobile telephone call made by Dr Martin Cooper
d. mobiles with cameras, GPS and Internet access
| A．a, c，b, d |
| B．b, a，c, d |
| C．a, c，d, b |
| D．a, b，c, d |
The last sentence of the whole passage "That's gr8 ！ But I'm v busy rite now. Will call U 2nite. " may probably mean __________.
| A．That's great! But I'm very busy right now. （I）Will call you to-night |
| B．It's eight now. I'm very busy. （I） Will call you tonight |
| C．That's great! But I'm busy writing now. （I） Will call you at two tonight |
| D．"8" is great! But I'm very busy right now. （I） Will call it "U" to night |
What do you think of the author according to the last paragraph?
| A．Humorous |
| B．Ironic |
| C．Kind |
| D．Worried |
What will power your house in the future? Nuclear, wind, or solar power? According to scientists at the Massachusetts Institute of Technology（MIT） in the US, it might be leaves-but artificial（人造的）ones.
Natural leaves are able to change sunlight and water into energy. It is known as photosynthesis（光合作用）. Now researchers have found a way to imitate this seemingly simple process.
The artificial leaf developed by Daniel Nocera and his colleagues at MIT can be seen as a special silicon chip with catalysts（催化剂）. Similar to natural leaves, it can split water into hydrogen and oxygen when put into a bucket of water. The hydrogen and oxygen gases are then stored in a fuel cell, which uses those two materials to produce electricity, located either on top of a house or beside the house.
Though the leaf is only about the shape of a poker card, scientists claimed that it is promising to be an inexpensive source of electricity in developing countries. "One can imagine villages in India and Africa not long from now purchasing an affordable basic power system based on this technology，" said Nocera at a conference of the American Chemical Society.
The artificial leaf is not a new idea. The first artificial leaf was invented in 1997 but was too expensive and unstable for practical use. The new leaf, by contrast, is made of cheap materials, easy to use and highly stable. In laboratory studies, Nocera showed that an artificial leaf prototype （原型）could operate continuously for at least 45 hours without a drop in activity.
The wonderful improvements come from Nocera's recent discovery of several powerful, new and inexpensive catalysts. These catalysts make the energy transformation inside the leaf more efficient with water and sunlight. Right now, the new leaf is about 10 times more efficient at carrying out photosynthesis than a natural one. Be-sides, the device can run in whatever water is available; that is, it doesn't need pure water. This is important for some countries that don't have access to pure water.
With the goal to " make each home its own power station" and" give energy to the poor"，scientists believe that the new technology could be widely used in developing countries, especially in India and rural China. Which of the following orders correctly shows how the artificial leaf is used to produce electricity?
a. artificial leaves split water into hydrogen and oxygen
b. the hydrogen and oxygen gases are stored in a fuel cell
c. the artificial leaves are put in water
d. the fuel cell uses hydrogen and oxygen to produce electricity
| A．c, b，a, d |
| B．c, a，b, d |
| C．b, c，a, d |
| D．c, a，d, b |
The purpose of the scientists at MIT in developing the new artificial leaf is to __________.
| A．build up more power stations in the world |
| B．provide cheaper energy for developing countries |
| C．offer people in developing countries access to pure water |
| D．gain a deeper understanding of the photosynthesis process |
The main idea of this passage is __________.
| A．an introduction to the history of artificial leaves |
| B．an invention copying photosynthesis |
| C．giving energy to the poor |
| D．mixture of water power and solar energy |
The underlined word " imitate" in Paragraph 2 can be replaced by "__________".
| A．produce |
| B．hold |
| C．prevent |
| D．copy |