Energy goes from one plant or animal to another. A food chain shows how this energy moves. Each time an animal gets eaten, its energy is passed onto the animal that eats it. The food chain is very important because it keeps the balance of nature. If one part of the food chain disappears, it can affect all the other plants and animals. Any threat to the food chain is a threat to the environment’s biodiversit(生物多样性). The food chain helps keep animal populations in balance. However, if something happens to increase or decrease one of the links in the food chain, that balance is broken. If one animal becomes endangered, it puts all the animals above it at risk.
Some of the threats are natural, such as wildfires, hurricanes, tornados, floods and so on. But the biggest threats to the food chain come from you and me. These threats include overhunting, overfishing, logging, farming, development, pollution, etc. The food chain is endangered anywhere humans have had an effect on the natural environment.
A recent study shows that the overfishing of large sharks is damaging the food chain along the US Atlantic coast. Canadian and American scientists say sharks are being killed in great numbers for their meat and fins(鳍). Now, not enough sharks are around to eat the cownose(牛鼻) ray. The ray’s population has increased and they have eaten up the shellfish to the point where it has hurt commercial(商业的) fishing.
Many of us disturb the natural environment in our own backyards. It’s up to us to take care of the environment and try not to disrupt the natural food chain. If we don’t act responsibly, animals will start disappearing.What can we learn from Paragraph 1?
| A．The food chain is not easy to be broken. |
| B．The energy of an animal usually disappears when it dies. |
| C．Increasing the links will not break the balance of nature. |
| D．Breaking the food chain is bad for the biodiversity of the environment. |
The study mentioned in Paragraph 3 proves that .
| A．human activities can be a big threat to the food chain |
| B．we are all responsible for the breaking of the food chain |
| C．natural disasters are hard to break the food chain |
| D．hunting large sharks for meat is beneficial |
We can infer that the writer wrote this passage mainly to .
| A．explain what the food chain is |
| B．tell us something interesting about Nature |
| C．suggest that we stop eating meat to save animals |
| D．suggest that we not disrupt the natural food chain |
A good friend of mine was complaining about her son the other day．“Did you notice,” she started, “how he didn’t wait for me to get my salad before he dove into his?”
True enough, the boy attacked his plate faster than a cat in the wild．Without manners, we’re no more than animals．Actually, that’s not true．I’ve been watching and feeding a group of wild cats, and they show unusual politeness toward each other．Even when food is scarce, they take turns, leaving at least a small part for the next in line．
My mother educated her three children to have good manners all the time．We were made to feel very uncomfortable as if we were sitting on pins and needles until we got used to saying please, thank you, pardon me, and I’m sorry．And I have to say, while it was a painful learning experience, it was one of the most valuable．
I can’t tell you how often I sat with my friends, eating at their dinner tables, and their parents thought highly of my good manners．While it was a little embarrassing, I knew even then that my mother’s teachings were paying off．
Many years later, when I was attending seminars across the country, my manners were quite useful．
While I regret that I haven’t been a perfect example, I’m still working on it．I suppose, in this regard, my mother lives on through me．I didn’t have her beautiful singing voice or her green eyes, but she did make sure I received one of her finest characteristics．What did the writer’s friend most probably complain about?
| A．Her son’s eating too quickly． |
| B．Her son’s not having a healthy diet． |
| C．Her son’s not having good table manners． |
| D．Teenagers’ not having good manners． |
The underlined word “scarce” in Paragraph 3 probably means “________”．
| A．too much | B．not delicious |
| C．not enough | D．quite hot |
We learn that the writer’s mother __________．
| A．was strict about her children’s manners |
| B．never punished her children |
| C．had beautiful blue eyes |
| D．was not good at singing |
What does the writer think of her experience of learning good manners?
| A．Easy and relaxing | B．Painful and valuable |
| C．Easy but useless | D．Too horrible |
We can infer from the passage that the writer _________．
| A．is surely liked by everyone around her |
| B．is not satisfied with most people’s manners around her |
| C．thinks she has been a perfect example to the young |
| D．thanks her mother for teaching her the good manners a lot |
Not all think laughter is the best medicine, but it seems to help．So scientists carried on a new study of diabetes （糖尿病） patients who were given a good dose of humor for a year to prove it．
Researchers divide 20 high-risk diabetic patients into two groups．Both groups were given standard diabetes medicine．Group L viewed 30 minutes of humor of their choice, while Group C, the control group, did not．This went on for a year of treatments．
By two months into the study, the patients in the laughter group had lower level of the hormones epinephrine （肾上腺素）, considered to cause stress, which is known to be deadly．After the 12 months, HDL cholesterol rises 26 percent in Group L but only 3 percent in Group C．In another measure, C-reactive proteins, a maker of heart disease, drop 66 percent in the laughter group but only 26 percent in the control group．
“The best doctors believe that there is a physical good brought about by the positive emotion, happy laughter,” said study leader Lee Berk of Loma Linda University．And other research has found that humor makes us more hopeful．Still, more study is needed, Berk said．The research by Berk found that humor can bring about similar changes in body chemistry, which was proved in the new study．The research result will be presented this month at the meeting in the US．Research at the University of Maryland School of Medicine shows that laughter causes the inner lining of blood vessels to expand, increasing blood flow in a way thought to be healthy．
“Lifestyle choices have an important effect on health and these are choices which we and patients should pay attention to, rather than prevention and treatment,” Berk said in a statement this week．Why did the scientists carry on the new research?
| A．To find out if laughter was good to health． |
| B．To discover the best medicine to cure diabetes． |
| C．Because the number of diabetic patients is the largest in the world． |
| D．Because diabetic patients need more laughter than other patients． |
After 12 months into the study, ___________．
| A．C-reactive proteins increase 66 percent in Group C |
| B．the level of the hormones epinephrine stays the same in both groups |
| C．the level of the hormones epinephrine has dropped |
| D．C-reactive proteins reduced 66 percent in Group L |
The underlined part “HDL cholesterol” in Paragraph 3 must be _______．
| A．something bad to our health | B．something good to our health |
| C．a kind of wonderful medicine | D．a kind of dangerous disease |
In what way does laughter benefit people’s health?
| A．Blood is made thick by laughter． | B．Laughter makes blood vessels thin． |
| C．Laughter increases blood pressure． | D．Laughter makes blood flow fast． |
According to Berk, we should _________．
| A．choose lifestyles carefully | B．change our lifestyles |
| C．prevent our lifestyles in advance | D．pay less attention to the positive emotion |
For centuries, the body’s blood has been linked closely with the emotions．People who show no human emotions or feelings, are said to be cold-blooded killer．For example, the police are searching for a cold-blooded killer．He seems to kill for no reason, and no emotion, as if taking someone’s life as nothing．
Cold can affect other parts of the body．The expression “get cold feet” has nothing to do with cold or your feet．The expression means being afraid to do something you have decided to do．For example, you agree to be president of an organization．But then you learn that all the other officers have resigned, and all the work of the organization will be your responsibility．You are likely to get cold feet about being president when you understand the situation．
The expression “give someone the cold shoulder” probably comes from the physical act of turning your back toward someone, instead of speaking to him face to face．You may give a cold shoulder to a friend who has not kept a promise he made to you．Or, to someone who has lied about you to others．
A cold fish is not a fish．It is a person．But it is a person who is unfriendly, unemotional and shows no love or warmth．A cold fish does not offer much of himself to anyone．Someone who is a cold fish could be cold-hearted．Now a cold-hearted person is someone who has no sympathy．Several popular songs in recent years were about cold-hearted men or cold-hearted women who, without feelings, broke the hearts of their lovers．
Out in the cold means not getting something that everybody else got．A person might say that everybody but him got a pay raise---he was left out in the cold．And it is not a pleasant place to be．There are _________ expressions related to cold that are mentioned in the passage．
| A．3 | B．4 | C．6 | D．7 |
When you refuse to speak to a man and treat him in a distant way, you may express by “_________”．
| A．I give him the cold shoulder | B．I think he is a cold-blooded man |
| C．I think he is a cold fish | D．I’m likely to get cold feet |
If Sue shows absolutely no reaction to those awful pictures of starving children in Africa, you will say _________．
| A．she is a cold-blooded killer | B．she gets cold feet |
| C．she is a cold fish | D．she is out in the cold |
We can use the expression “__________” to describe a man who abandons or hurts his lover without mercy．
| A．cold-blooded | B．cold shoulder |
| C．cold feet | D．cold-hearted |
The topic of this passage is about _________．
| A．the relationship between cold and our body |
| B．some expressions about friendship |
| C．some expressions connected with cold |
| D．how cold weather comes into being |
When newspapers and radio describe the damage caused by a hurricane named Hazel,girls named Hazel are probably teased by their friends.To keep out of trouble,the Weather Bureau says,“Any resemblance between hurricane names and the names of particular girls is purely accidental.”
Some women became angry because hurricanes are given their names,but many other women are proud to see their names make headlines.They don’t even care that they are the names of destructive storms.Because more women seem to like it than dislike it,the Weather Bureau has decided to continue using girl’s names for hurricanes.
In some ways a hurricane is like a person.After it is born,it grows and develops,then becomes old and dies.Each hurricane has a character of its own.Each follows its own path through the world,and people remember it long after it gone.So it is natural to give hurricanes’ names,and to talk about them almost if they were alive.What happens to girls named Hazel according to the passage?
| A．They suffer from hurricanes. |
| B．The Weather Bureau look for them. |
| C．Others often make fun of them. |
| D．They can’t find boyfriend. |
The underlined word“resemblance”probably means ______.
| A．trouble | B．difference | C．sameness | D．success |
According to the passage,which is more reasonable?
| A．Some women feel unhappy because hurricanes are given their names. |
| B．A lot of women complain of the Weather Bureau. |
| C．Many women want to be known. |
| D．All the hurricanes are caused by women. |
Public opinions make the Weather Bureau ______.
| A．consider the disagreement of some women |
| B．go on naming hurricanes after women |
| C．name hurricanes after men |
| D．look for a new method to name hurricanes |
It is natural to give hurricane names because ______.
| A．they become old and die |
| B．all of them should be remembered |
| C．each hurricane has its own day to come |
| D．each hurricane has its own character |
I came to study in the United States a year ago .Yet I did not know the real American society until I was injured in a car accident because after the accident I had to see a doctor and go to court.
After the accident .my roommate called a doctor for me. I was very grateful and determined to repay him one day. But the next day, he asked me to pay him $200 for what he had done. I was astonished. He had good reason to charge me, he said. And if I wanted to collect money from the person who was responsible for my injury, I’d have to have a good lawyer. And only a good doctor can help me get a good lawyer .Now that he had helped me find a good doctor, it was only fair that I should pay him.
But every day I went to see the doctor, I had to wait about 50 minutes. He would see two or three patients at the same time, and often stop treating one so as to see another. Yet he charged me $115 each time .The final examination report consisted of ten lines, and it cost me $215.
My lawyer was all smiles the first time we met. But after that he avoided seeing me at all. He knew very well the other party was responsible for the accident, yet he hardly did anything. He simply waited to collect his money. He was so irresponsible that I decided to dismiss him. And he made me pay him $770.
Now I had to act as my own lawyer. Due to my inexperience, I told the insurance company the date I was leaving America. Knowing that, they played for time…and I left without getting a cent.
My experiences taught me two things about America: firstly, in a country like America money is everything. It is more important than friendship, honor or professional morality (道德). Secondly, foreigners are still being unfairly treated. So when we talk about America, we should see both its good and bad sides.The author’s roommate offered to help him because________.
| A．he felt sorry for the author |
| B．he thought it was a chance to make some money |
| C．he knew the doctor was a very good one |
| D．he wanted the author to have a good lawyer |
A good doctor is essential for the author to __________.
| A．be properly treated |
| B．talk with the person responsible for the accident |
| C．recover before he leaves America |
| D．eventually get the responsible party to pay for his injury |
The word“charge”in the third paragraph means_________ .
| A．be responsible | B．accuse | C．ask as a price | D．claim |
Both the doctor and the lawyer in this passage are very__________.
| A．friendly | B．selfish | C．professional | D．busy |
What conclusion can you draw from the story?
| A．Going to court is something very common in America. |
| B．One must be very careful while driving a car. |
| C．There are more bad sides in America than good sides. |
| D．Money is more important than other things in the US. |