Can eating a chocolate bar every day really prevent age-related memory loss? No. But a new research shows that large amounts of flavones, substances found in cocoa, tea and some kinds of vegetables, may improve age-related memory failure.
Dr. Scott Small is a professor of neurology at Columbia University in new York City He is the lead writer of a research paper describing the effects of cocoa flavones on brain activity His study involved 37 volunteers aged between 50 and 69. Researchers gave them a high-level flavones drink made from cocoa beans or a low-level flavones drink. For a period of three months, some subjects got 900 milligrams of flavones a day. The others got 10 milligrams of flavones each day. Brain imaging and memory tests were given to each study subject before and after the study Dr. Small says that the subjects who had the high-level flavones drink showed much improvement on memorytests.
The researchers warn that more work is needed to be done because this study was performed only on a small group. Dr. Joann Manson is the lead researcher of a four .year study involving 18,000 adults. This study will use flavones capsules(胶囊) The study subjects will be divided into two groups and will take two pills per day. The capsules used will all Look the same. But one group's capsules will contain flavones, while the other group will take capsules made of an inactive substance, or placebo
Dr. Manson says it's not necessary for people to start eating more chocolate, because 3 person would have to eat a huge amount of chocolate to get the same level of flavones given to the Lest subjects. He adds many manufacturers have planned to remove the flavones from their chocolate products. Similarity, Dr. says a cocoa-based flavones extract（提取）may be developed in the future But he says that more studies are needed to see how much flavones is good for our healthWhat was done to the subjects alter Dr. Small's study?
| A．They were asked to take a high-level flavones drink |
| B． They were given capsules containing flavones |
| C． They were given brain imaging and memory tests |
| D． They were asked to take two pills of flavones capsules per day |
What's the similarity of the 2 experiments?
| A．Both use high-level flavones capsules |
| B．The number of the subjects is the same |
| C．Drinks and placebos are used in both experiments |
| D．The subjects are divided into two groups in both experiments |
Why will Dr. Manson carry out the four-year study?
| A．To prove the first experiment is wrong |
| B．To carry out the experiment further |
| C．To test how much flavones can improve our memory. |
| D．To show eating chocolate is better to improve memory. |
What can we learn from the last paragraph?
| A．It's not necessary for us to eat chocolate |
| B．The more we eat flavones, the better our health will be |
| C．In the future we can get flavones without eating chocolate |
| D． It's easy for people to get the same level of flavones given to the test subjects |
An 80-year-old man was sitting on the sofa in his house along with his 45-year-old highly educated son. Suddenly a crow(乌鸦) rested on their window.
The father asked his son, “What is this?”
The son replied “It is a crow.”
After a few seconds the father asked his son the second time, “What is this?”
The son said, “Father, I just now told you; it is a crow.”
After a little while, the old man again asked his son the third time, “What is this?”
At this time some expression of anger was felt in the son’s tone when he said to his father, “It is a crow, a crow.”
A little later, the father again asked his son the fourth time, “What is it?”
This time the son shouted at his father, “Why do you keep asking me the same question again and again? Although I have told you so many times? It is a crow. Are you not able to understand this?”
A little later the father went to his room and came back with an old diary which he had kept since his son was born. On opening a page, he asked his son to read that page. The following words were written in it:
Today my little son aged three was sitting with me on the sofa. When a crow was sitting on the window, my son asked me 23 times what it was, and I replied to him all 23 times that it was a crow. I hugged him lovingly each time he asked me the same question again and again for 23 times. I did not at all feel angered. I rather felt affection for my innocent(单纯的) child.
So ……
If your parents reach old age, do not look at them as a burden, but be kind to them. Be considerate to your parents.How many times did the father asked his son the same question?
| A．Twice. | B．Three times. |
| C．Tour times. | D．Twenty-three times. |
What was written in the diary mainly shows_________.
| A．the son’s foolishness | B．the father’s loneliness |
| C．the father’s love for his son | D．the son’s curiosity |
After reading the diary, the son most probably felt_________.
| A．very disappointed | B．even angrier |
| C．rather happy | D．deeply ashamed |
What lesson should we learn from the passage?
| A．We should be considerate to our parents. |
| B．It’s important to be a great father. |
| C．We should form the habit of keeping a diary. |
| D．Old diaries have extraordinary values. |
The morning had been a disaster. My tooth was aching, and I’d been in an argument with a friend. Her words still hurt: “The trouble with you is that you won’t put yourself in my place. Can’t you see things from my point of view?” I shook my head stubbornly（固执地）and felt the ache in my tooth. I’d thought I could hold out till my dentist came back from holiday, but the pain was really unbearable. I started calling the dentists in the phone book, but no one could see me immediately. Finally, at about lunchtime, I got lucky.
“If you come by right now,” the receptionist said, “the dentist will fit you in.”
I took my purse and keys and rushed to my car. But suddenly I began to doubt about the dentist. What kind of dentist would be so eager to treat someone at such short notice? Why wasn’t he as busy as the others?
In the dentist’s office, I sat down and looked around. I saw nothing but the bare walls and I became even more worried. The assistant noticed my nervousness and placed her warm hand over my ice-cold one.
When I told her my fears, she laughed and said, “Don’t worry. The dentist is very good.”
“How long do I have to wait for him?” I asked impatiently.
“Come on, he is coming. Just lie down and relax. And enjoy the artwork,” the assistant said.
“The artwork?” I was puzzled.
The chair went back. Suddenly I smiled. There was a beautiful picture, right where I could enjoy it: on the ceiling. How considerate the dentist was! At that moment, I began to understand what my friend meant by her words.
What a relief!Which of the following best describes the author’s feeling that morning?
| A．Upset. | B．Nervous. | C．Satisfied. | D．Cheerful. |
What made the author begin to doubt about the dentist?
| A．The laughing assistant of the dentist. |
| B．The dentist’s being as busy as the other dentists. |
| C．The surroundings of the dentist’s office. |
| D．The dentist’s agreeing to treat her at very short notice. |
What did the author learn from her experience most probably?
| A．Strike while the iron is hot. |
| B．Put oneself in others’ shoes. |
| C．Have a good word for one’s friend. |
| D．A friend in need is a friend indeed. |
When a starving man gets a meal, he begins to think about an overcoat; when an executive gets a new sports car, visions of country clubs and pleasure beats dance into view.
The many wants of mankind might be regarded as making up several levels. .
The first and most basic level of wants involves food. Once this want is satisfied, a second level of wants appears: clothing and some sort of shelter. By the end of World War II these wants were satisfied for a great majority of Americans. It included such items as automobiles and new houses.
By 1957 or 1958 this third level of wants was fairly well satisfied. Then, in the late 1950s a fourth level of wants appeared: the “life-enriching” level. While the other levels involve physical satisfaction－the feeding, comfort, safety, and transportation of the human body－this level stresses mental needs for recognition, achievement and happiness. It includes a variety of goods and services, many of which could be called “luxury” items. Among them are vacation trips, the best medical care, and entertainment.
On this level, a greater percentage of consumer spending goes to services, while on the first three levels more is spent on goods. Will consumers raise their sights to a fifth level of wants as their income increases, or will they continue to demand luxuries and personal services on the fourth level?
A fifth level probably would involve wants that can be achieved best by community action. Consumers may be spending more on taxes to pay for government action against disease, ignorance, crime and prejudice. In this way, we can enjoy more fully the good things on the first four levels.
| A．Then a third level appeared. |
| B．Human wants seem endless. |
| C．When there is money enough to satisfy one level of wants, another level appears. |
| D．There are several levels of wants in one’s life. |
E. At this stage, we now may seek to ensure the health, safety, and leisure.
F. Also included here are fancy foods and the latest styles in clothing.
G. Different people have different wants on each level.
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. Besides，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，a，b，d | B．c，b，a，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．a mixture of water power and solar energy |
| C．giving energy to the poor |
| D．an invention copying photosynthesis |
Pilling a cat can be a 'terrible” experience. Cats don’t want something pushed down their throats, and they’ll fight with all their strength to prevent it. In fact, it’s amazing how powerful their small bodies can be.
The easiest way of pilling a cat is to press the pill into powder. Then mix the powder with a small amount of wet food. If your cat usually eats dry food, she will probably view the wet food as a treat and eat it up.
If your cat won’t eat the wet food that contains the pill or if she is too ill to eat, you can get a “pill gun”. There are some basic instructions. Getting your cat’s mouth to open is going to be the most difficult part. First, be sure the pill is in a handy place. Then you can put your cat on a bookshelf with her bottom in a corner or you can put her on your lap firmly tied. Have your cat facing to the right if you’re right-handed. With your left hand, hold your cat at the cheekbones, putting your palm (手掌) at the top of her head. Keeping your finger off the trigger (扳机), with your right hand, insert the pill gun until the pill is positioned over the tongue and open throat. Be sure to give your cat a treat directly after giving the pill.
If you don’t feel comfortable using a pill gun, you can try giving the pill by hand. Push your cat’s head backwards just far enough so that her nose is pointing towards the ceiling. At this point, most cats will slightly open their mouths. With the little finger or ring finger of the hand holding the pill, open the bottom jaw a little more. You may need to hold her top jaw with your other hand while doing this. Aim straight and lightly throw the pill or drop it. Most cats will then swallow the pill.Pilling a cat can be a terrible experience because cats ______.
| A．are amazingly powerful and dangerous |
| B．may fight with all their strength against pills |
| C．refuse something pressed down their throats |
| D．are difficult to treat once they’ve got ill |
Which of the following statements is true according to the second paragraph?
| A．Wet food with medicine is usually a treat to cats. |
| B．Cats used to dry food must reject wet food. |
| C．The easiest pilling is to press the pill into powder. |
| D．Cats are most likely interested in something new. |
Using a “pill gun”, you had better hold your cat ______ if you’re left-handed.
| A．facing to the right | B．with your right hand | C．at the head | D．on your lap firmly |
A cat probably opens its mouth naturally when ______.
| A．its nose is straight upwards | B．it is touched by fingers |
| C．its head is turning around | D．it is served with its favorite pills |