“Plants were expected to get larger with increased carbon dioxide in atmosphere, but changes in temperature, humidity(湿度) and nutrient availability（养分有效性） seem to trumped the benefits of increased carbon dioxide，” said researchers from the National University of Singapore.
45 percent of the species studied now reach smaller adult sizes than they did in the past. The researchers pointed out that warmer temperatures and changing habitats, caused by climate change, are possible reasons for shrinking(缩小的) creatures.
“We do not yet know the mechanisms（原理） involved, or why some organism are getting smaller while others are unaffected，” the researchers said. “Until we understand more, we could be risking negative consequences that we can't yet quantify.”
The change was big in coldblooded animals. Only two decades of warmer temperatures were enough to make reptiles（爬行动物） smaller. An increase of 1 degree centigrade caused nearly a 10 percent increase in metabolism (新陈代谢). Greater use of energy resulted in tiny tortoises and little lizards. Fish are smaller now too. Though overfishing has played a part in reducing numbers, experiments show that warmer temperatures also stop fish growth. There is a recent report on warmer temperatures' negative effects on plankton（浮游生物）, the base of the marine（海洋的） ecosystem.
Warmblooded animals weren't immune（免于） from the size change caused by climate change. Many birds are now smaller. Mammals have been miniaturized too. Soay sheep are thinner. Red deer are weaker. And polar bears are smaller, compared with historical records.
This is not the first time this has happened in Earth's history. 55 million years ago, a warming event similar to the current climate change caused bees, spiders and ants to shrink by 50 to 75 percent over several thousand years. That event happened over a long time than the current climate change.
The speed of modern climate change could mean organisms may not respond or adapt quickly enough, especially those with long generation times. So, it is likely that more negative influences of climate change will be shown in future.Which of the following would be the best title for the passage? ________
| A．Why do some species become smaller? |
| B．Species become smaller as climate warms |
| C．Climate change has many negative effects |
| D．How does temperature change in Earth's history? |
The underlined word “trumped” in the first paragraph can be replaced by ________.
| A．been neglected by | B．been less than |
| C．been weakened by | D．had strong influences than |
Researchers from the National University of Singapore believe that ________.
| A．too many studies on animals' size have been done |
| B．all the animals on the earth have become smaller |
| C．how climate change effects animals' size has not been found clearly |
| D．people can avoid the negative effects of climate change |
What can we learn from the passage? ________
| A．Ants, bees and spiders have been shrinking by 50% to 70% in the past decade. |
| B．Birds have suffered more from climate change than fish. |
| C．Climate change has even affected plankton negatively. |
| D．A warming event causing species to become smaller has never happened before. |
Many parents watch the news or other shows as children play nearby. But new research shows that even when the television is just background noise，it may be disruptive to a child’s normal development.
It’s estimated that 75 percent of very young children in the United States live in homes where the television is on most of the time，even though the kids often aren’t watching it. The University of Massachusetts researchers recently studied how TV background noise might affect young children. The study looked at 50 1，2and 3yearolds. Each child came to a lab with a parent and was allowed to play for an hour with various toys. For half the time，a television was on in the room，showing the adult game show as well as advertisements. During the other half hour，the TV was turned off.
As expected，the children paid little attention to the adult television show，glancing at it for less than a few seconds at a time，and less than once a minute. Even so，the distraction (分心) of the background noise had a significant effect on how children at every age played. When the television was on，the children played with each toy for far shorter periods of time，and focused attention during play was also shorter compared to how they played when the TV was off.
Researchers said that even though the children aren’t interested in the show，background TV affects their ability to do various types of play. The finding is important because many wellmeaning parents who wouldn’t let their young children watch television may not realize that even adult programs that don’t interest children still can have an effect.
“Background TV is potentially a chronic (长期的) environmental risk factor affecting most American children，” said the lead author of the study. “Parents should limit their young children’s exposure (接触)．”We know from the passage that________.
| A．background TV noise has little effect on adults |
| B．most young children in America live in homes exposed to TV noise |
| C．the effect of background TV noise on children is immediate |
| D．most parents in America wouldn’t let their children watch TV |
The underlined word “disruptive” in Paragraph 1 is closest in meaning to________.
| A．harmful | B．important | C．similar | D．related |
In the study，the children________.
| A．were all 3yearolds | B．were asked to watch adult TV shows |
| C．played for an hour while the TV was on | D．played with more than one toy |
What does the study show?
| A．Children pay much attention to adult TV shows. |
| B．Children should be allowed to watch TV for kids only. |
| C．The background TV noise affects children’s ability to focus. |
| D．The more toys a child has，the shorter time he plays with each one. |
London Underground
The world’s first subway was built in London in 1863. At the time，the government was looking for a way to reduce traffic problems in the city of London. The poor areas of the city were so crowded with people that it was almost impossible for horse carriages to get through. The city officials were interested in trying to make it possible for workers to live outside of London and travel easily to work each day. If people had a cheap and convenient way that they could depend on to go to and from work， they would relocate their homes outside of the city. This would help ease(减轻) the pressure of too many people living in the poor parts of London. From these problems，the idea of the London Underground，the first subway system，was born.
The plans for building the Underground met with several problems and delays，but the fast track was finally opened in January 1863. A steam train pulled the cars along the fast underground track which was 6 kilometers (3.7 miles) long. About 30，000 people got on the subway the first day. Riders were treated to comfortable seats (standing up while the train was moving was not allowed)， and pleasant decorations inside each of the cars. However， the smoke from the engine soon filled the air in the tunnels with ash and soot(煤灰)， as well as chemical gases. Fans had to be put in the tunnels later to keep the air clean enough for people to breathe. Even with its problems，riding in the Underground did catch on. It carried 9 million riders in its first year.How did the London Underground solve the smoke problem？
| A．It made the tunnels larger. |
| B．It put fans in the tunnels. |
| C．It cleaned the chemical gases in the tunnels. |
| D．It reduced the number of passengers riding in the train. |
What led the British government to build the London Underground？
| A．Traffic jams and pollution. |
| B．Population and pollution. |
| C．Overcrowding and traffic jams. |
| D．The poverty and subway problems. |
Which of the following is TRUE？
| A．To relocate the workers’ homes outside London，the government built the subway. |
| B．There were so many problems and delays that in 18th century the first subway opened. |
| C．The subway greatly eased the pressure of traffic. |
| D．There were not enough seats for the passengers the first day the subway opened. |
The underlined phrase “catch on” most probably means “______”.
| A．be troublesome | B．become popular and fashionable |
| C．keep up with | D．seize |
For a long time, a boy wondered why his next-desk-pal was always the first in the class, whereas he could only rank the 21st. At home, he asked his mom, “Am I more stupid than other kids? How come I always lag behind? I just can’t come up with an answer.” Mom was aware that her son’s self-respect had been damaged by the ranking system, but she didn’t know what to say to help.
She was tempted (想要) to say that intelligence differs and that yes, her son’s friend really was the smarter boy. But that would have so upset her son. Thank goodness she resisted the temptation to say it.
Her son and his friend went on to high school that year, but despite trying as hard as he could, her son’s friend still outdid him. But she was proud of her boy for his hard work, sincerely proud. It was around this time she decided to take him on a trip to the seaside. On the trip, she at last found an answer for him.
Today her son no longer cares about rankings. He doesn’t have to, for he himself is now the top of the class – at the top national university he attends. Invited to speak to his old high school, he mentioned a valuable childhood experience: “Once, on a trip to the sea, my mother and I were lying on the beach. She pointed to the sea and said to me: ‘Do you see the seabirds fighting for food out there? When a wave comes near, the little birds rise quickly. The “clumsy” seagulls (海鸥) are far less agile (灵活的) and have to struggle to get away from the wave. But these “clumsy” birds prove to have the biggest, strongest wings, which open the widest and allow the bird to travel the furthest. When the season changes, they leave for foreign shores, leaving the little birds behind. Son, I have a feeling that you are one of those seagulls.” From the first paragraph, we could conclude the mother ______.
| A．knew her son was not bright enough |
| B．saw the negative effects of the ranking system |
| C．decided to help with her son’s school work |
| D．was troubled by her son’s low rankings |
The mom was glad she didn’t give an answer at first because ______.
| A．she knew her son would forget his rankings soon |
| B．she felt intelligence doesn’t mean everything |
| C．she knew he was not strong enough for the truth |
| D．she wanted to avoid another blow to her son’s self-respect |
The story conveys the message that ______.
a. only rankings show intelligence
b. hard work and confidence can lead to a change in rankings
c. parents should see children’s strengths and encourage them
d. competition between students is good for society
| A．bc | B．cd | C．abc | D．bcd |
Once when I was six years old I saw an amazing picture in a book called True Stories from Nature about the primeval（原始的）forest. It was a picture of a boa constrictor(大蟒蛇) in the act of swallowing an animal. In the book it said：“Boa constrictors swallow their prey whole without chewing（嚼）it. After that they are not able to move and they sleep through the six months that they need for digestion（消化）.”
I thought deeply then over the adventures of the jungle. And after some work with a colored pencil I succeeded in making my first drawing. My Drawing Number One. I showed my work to the grown-ups and asked them whether the drawing frightened them. But they answered：“Frighten? Why should anyone be frightened by a hat？”
My drawing was not a picture of a hat. It was a picture of a boa constrictor digesting an elephant. But since the grown-ups were not able to understand it, I made another drawing. I drew the inside of the boa constrictor so that the grown-ups could see it clearly. They always need to have things explained. That's my Drawing Number Two.
The grown-ups' response this time was to advise me to lay aside my drawings of ba constrictors whether from the inside or the outside and devote myself instead to geography, history, arithmetic and grammar. That is why at the age of six I gave up what might have been a great painter. I had been disheartened by the failure of my Drawing Number One and my Drawing Number Two. Grown-ups never understand anything by themselves and it is tiresome for children to be always and forever explaining things to them.
So then I chose another profession（职业） and learned to pilot airplanes. I have flown a little over all parts of the world; and it is true that geography has been very useful to me. At a glance I can distinguish China from Arizona. If one gets lost in the night, such knowledge is valuable.
In the course of this life I have had lots of chances to meet with a great many people. And that hasn't much improved my opinion of them. Whenever I met one of them who seemed to me at all clear-sighted, I tried showing him my Drawing Number One which I have always kept. I would try to find out if this was a person of true understanding. But whoever it was, he or she would always say: That is a hat. Then I would never talk to that person about boa constrictors or primeval forests or stars. I would bring myself down to his level. I would talk to him about bridge and golf and politics and neckties. And the grown-up would be greatly pleased to have met such an intelligent man.The writer drew his first picture in order to ________.
| A．show the grown-ups what the book was about |
| B．frighten the grown-ups trying to enter the forest |
| C．remind himself of the adventures of the jungle |
| D．illustrate（说明）a boa constrictor's act of digesting an animal |
How did the writer understand the grown-ups' response to his second drawing?
| A．He was actually only good at academic study. |
| B．It was a waste of time for him to keep on drawing. |
| C．He had difficulty in communicating with the adults. |
| D．He was good at anything but geography. |
The underlined word disheartened in Paragraph 4 could most probably be replaced by ________.
| A．discouraged | B．dissatisfied | C．discovered | D．disturbed |
Which of the following statements is true?
| A．The writer could have become a pilot if encouraged when young. |
| B．The writer finally changed his opinion of grown-ups. |
| C．The writer has been showing his two pictures to others ever since. |
| D．The writer felt nobody could have really understood him. |
A speech is a wonderful opportunity to inform, persuade or entertain. The best speeches often take on a combination of all three of these components（组成部分）. However, before you can go about the writing of a great speech, it is important to set goals. Goals keep you，your speech and your audience focused.
What a goal is
In the context of a speech, a goal is the purpose of the speech, and what it hopes to accomplish. For example, the goal of a eulogy(颂歌) might be to celebrate the life of a loved one. The goal of a speech at a political gathering would be to inform the crowd about the political position of a candidate and persuade them to vote and campaign for the candidate in question（正被讨论的）.
Why a goal is important
Without a goal, a speech is without direction. The goal informs the structure and content of the speech. For example, if a speech's goal is to convince people that smoking is bad for them, the speech will be structured with persuasive arguments to back up the goal. A speech with a goal of informing the audience will keep the information fair and factual.
A goal is incredibly important to the speech's ability to connect with an audience. If the speaker is unaware of the goal of the speech, the audience will likely be unaware as well. This severely reduces the effectiveness of the message.
Aside from informing the audience of the content and structure, a speech's goal drives the speaker to greater heights. If a speaker is asked to speak on a specific subject, but never establishes the goal, they won't know where to start in the research, organizing and writing of the speech.
______________
If you have been charged with(被委以) delivering a speech, establishing a goal can seem difficult at first. There are several things to take into consideration. First, think about who you will be speaking to. The demographic(人口统计) of your audience will likely determine whether you will be able to persuade them, or whether they will be able to sit through（一直坐到……结束）. Second, think about the topic itself. If the topic is something controversial（有争议的）, it may worth your while to consider an informative approach to present both sides of the issue. Finally, consider your resources. A speech with an informative or persuasive goal usually requires a great deal of research, and sometimes takes more time to write.According to the passage, what three components does the best speech combine?
| A．Informing, delivering and entertaining. |
| B．Informing, persuading and entertaining. |
| C．Informing, writing and delivering. |
| D．Informing, writing and persuading. |
The goal of a speech at a political gathering might be ________.
| A．to persuade the audience to vote for a candidate |
| B．to celebrate the life of a person you admire |
| C．to entertain the audience with humor and magic |
| D．to persuade the audience to buy new products |
All the following indicate the importance of a speech goal EXCEPT that ________.
| A．a speech will lose its direction without a goal |
| B．a speech goal can help keep the audience aware of the speech |
| C．a speech goal can help the speaker know about the research, organizing and writing |
| D．a speech goal makes it possible for the speaker to achieve whatever he wants in life |
Which of the following can be filled into the blank as the subtitle for the last paragraph?
| A．How to achieve a speech goal | B．How to deliver a difficult speech |
| C．What to consider to establish a goal | D．What to consider to deliver a speech |