When an ant dies, other ants take it out of the nest, often within an hour after its death. This behavior interests scientists and they wonder how ants know for sure—and so soon—that another ant is dead.
One scientist recently came up with a way to explain this ant behavior. Dong-Hwan Choe is a biologist, a scientist who studies animals and plants. He found that ants have a chemical on the outside of their bodies that signals to other ants, “I'm dead—take me away” when it is dead.
But there's a question to answer: As we know, if an ant is dead, it stops moving. But when an ant is sleeping or knocked unconscious, it is also not moving. However, other ants don't move the living ant out of the nest. How do they know this ant is not dead? Choe found that ants have another chemical on their bodies, which tells nearby ants something like, “Wait—I'm not dead yet” when it is not dead. Choe suspects that when an ant dies, the chemical that says, “Wait I'm not dead yet” quickly goes away. When other ants detect the “dead” chemical without the “not dead yet” chemical, they move away the body.
To test his theory , Choe and his team put different chemicals on ants. When the scientists used the “I'm dead” chemical, other ants quickly moved the treated ant away. When the scientists used the “Wait—I'm not dead yet” chemical, other ants left the treated ant alone. Choe believes this behavior shows that the “not dead yet” chemical overrides the “dead” chemical when picked up by other ants. And that when an ant dies, the “not dead yet” 
chemical fades away. Other nearby ants then detect the remaining “dead” chemical and remove the body from the nest.
Understanding this behavior can help scientists figure out how to stop ants from invading new places and causing problems.What is the function of the first paragraph?
| A．Leading the following paragraphs. |
| B．Showing the main idea of the passage. |
| C．Introducing the background of the passage. |
| D．Giving a summary of the passage. |
Which of the following has the closest meaning to the underlined word “overrides” in the fourth paragraph?
| A．is weaker than | B．is stronger than | C．is better than | D．is worse than |
What can we learn from the passage?
| A．Living ants can also be taken away when they are not moving. |
| B．When an ant dies, it can tell others using a certain chemical. |
| C．A living ant can pretend to be dead using a special chemical. |
| D．Ants often use chemicals to communicate with each other. |
Which of the following descriptions about Dong-Hwan Choe is right?
| A．Choe did this study in order to stop ants from invading new places. |
| B．Choe is a biologist who is only interested in animals, especially in ants. |
| C．Choe first came up with an idea to explain this ant behavior，and then did some tests to prove his theory. |
| D．Choe did the research on this ant behavior on his own |
What is mainly discussed in the passage?
| A．How to decide whether an ant is dead or not. |
| B．Why ants have special chemicals on their bodies. |
| C．reasons for the removable behavior of ants. |
| D．How ants manage to keep their nests clean. |
Louis Armstrong had two famous nicknames. Some people called him Bagamo. They said his mouth looked like a large bag. Musicians often called him Pops, as a sign of respect for his influence on the world of music.
Born in 1901 in New Orleans, he grew up poor, but lived among great musicians. Jazz was invented in the city a few years before his birth. Armstrong often said, “Jazz and I grew up together.”
Armstrong showed a great talent for music when he was taught to play the cornet (短号) at a boy’s home. In his late teens, Armstrong began to live the life of a musician. He played in parades, clubs, and on the steamboats that traveled on the Mississippi River. At that time, New Orleans was famous for the new music of jazz and was home to many great musicians. Armstrong learned from the older musicians and soon became respected as their equal. In 1922 he went to Chicago. There, the tale of Louis Armstrong begins. From then until the end of his life, Armstrong was celebrated and loved wherever he went. Armstrong had no equal when it came to playing the American popular song.
His cornet playing had a deep humanity and warmth that caused many listeners to say,“Listening to Pops just makes you feel good all over.” He was the father of the jazz style and also one of the best-known and most admired people in the world. His death, on July 6, 1971, was headline news around the world.Armstrong was called Pops because he .
| A．looked like a musician |
| B．was a musician of much influence |
| C．showed an interest in music |
| D．traveled to play modern music |
The third paragraph is developed .
| A．by space | B．by examples |
| C．by time | D．by comparison |
Which statement about Armstrong is true?
| A．His tale begins in New Orleans. |
| B．He was born before jazz was invented. |
| C．His music was popular with his listeners. |
| D．He learned popular music at a boy’s home. |
Which would be the best title for the text?
| A．The Invention of the Jazz Music |
| B．The Father of the Jazz Style |
| C．The Making of a Musician |
| D．The Spread of Popular Music |
Dear College Dean,
It is my understanding that this college has received a large donation to be used to enhance (improve) the quality of life for students: expand the bookstore or add computers to the computer lab. It is the tradition of this school to promote education and to be the pioneer of new technology. That is why I strongly argue in favor of the addition of more computers to the computer lab.
Although expanding the campus bookstore to include CDs, gifts, and a snack bar will give a nicer look to the college, we have to think about a greater goal and a more practical way to enhance the quality of life for students. What do we .want for our students and our college? Do we want our college to be known as a place with a great bookstore where you can find CDs and gifts, or as a place where the students can explore and research in their field using the best tools provided by technology? In addition, there are already several snack bars on campus, and there are music stores nearby, so students do not depend on the college bookstore for these things.
We live in a highly technological world and computers play an increasingly important role in how we live. As a learning institution, this college has the responsibility to offer its students the best technology to help them prepare for their future. Many students will be expected to be familiar with the latest software and other tools when they go on to work or to graduate school.
While they are in college, students find they are expected to use computers. Many professors expect students to use computers to do homework or to complete projects. Since students are competing for good grades, those who have limited access to computers are at a great disadvantage. Furthermore, being able to do projects using the computer enhances the process of learning.
If there are more computers, no more will students have to wait in line while scanning the room for an empty chair and computer.. No longer will they have to sit and wait while an outdated computer struggles to follow their commands. Having more new and faster computers available will enable students to finish their work more quickly.
The more computers are used in society, the more colleges will depend on them as a tool of teaching and learning. Making computers more available to students facilitates their learning process by making the process easier, more interesting, more engaging, and in the process enhancing their quality of life.From the passage we can infer that .
| A．present computers in the college cannot meet the demands of the students |
| B．computers in the college will be updated to meet the students’ demands soon |
| C．the college has the responsibility to help the students to prepare for their future |
| D．it is also necessary to expand the college bookstore by using part of the donation |
In paragraph 4，the author mainly wants to tell us that .
| A．computers are beneficial to students’ academic(学业) success |
| B．computers are helpful to students competition for success |
| C．students find it convenient to do assignments by using computers |
| D．students wish to use the money to buy more advanced computers |
Which of the following shows the organization of the passage?
CP: central point SP: sub-point(次要点) P: point C: conclusion
Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through, and this is necessary for plants to make the food that we eat. Heat, too, makes our environment endurable. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in space, The unit of radiation is called “rem” Scientists have reason to think that a man can put up with far more radiation than 0.1rem without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is extremely difficult to be sure about radiation damage. A person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed children or even grandchildren. Missions of the Apollo flights have had to cross belts of high radiation and , during the outward and return journeys, the Apollo crew accumulated(积累) a large amount of rems. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far.In which way is the atmosphere necessary to man according to the first paragraph?
| A．It screens off the falling meteors. |
| B．It provides enough light for plants to grow. |
| C．It supplies the heat necessary for human survival. |
| D．It protects him against the harmful rays from space. |
We know from the passage that .
| A．exposure to even tiny amount of radiation is fatal( 致命的) |
| B．the effect of exposure to radiation is slow in coming |
| C．radiation is avoidable in space exploration |
| D．astronauts in spacesuits needn’t worry about radiation damage |
The underlined word “deformed” probably means .
| A．badly-shaped | B．weak |
| C．naturally-grown | D．ugly |
It can be inferred from the passage that .
| A．the Apollo mission was very successful |
| B．astronauts will have deformed children or grandchildren |
| C．protection from space radiation is no easy job |
| D．radiation is not a threat to well-protected space explorers |
We live in a techno logical society where most goods are mass-produced by unskilled labor. Because of this, most people think that craft(手艺) no longer exists.
One of the ways these people wrongly support their view is by pointing to 100-year-old homes which are still solid, and arguing that it is the craftsmanship that is responsible for their durability(持久性). “Homes in those days were well-built,” they say. No doubt these homes were well-built, but what these people have done is mix up the quality of material used in the house with the quality of the craftsmanship.
Homes today could be built to last just as long as those old homes if people were willing or able to pay the price. For example, more people can no longer afford solid oak stairways, although they were once fairly common in older homes. Nor can they afford the high labor cost of employing a carpenter to build the stairway. Yet if someone can pay the high cost, there are still plenty of carpenters around able to make those stairways. And not only would these carpenters know how to build them, they would probably do a better job than carpenters of old.
One thing the modern carpenter has which enables him to do a better job is much more advanced tools. Such tools as laser beams and power planes help them lay out a house better and make more precision cuts(精确切割)on the wood. Also, it is not uncommon any more to find carpenters with college degrees and carpenters with a solid knowledge of mathematics, which would enable them to deal with more difficult house designs.
The problem of modern quality, then, really boils down to the problem of material, for the modern carpenter is just as able to produce craftsmanship as the carpenter of fifty years ago, but only if given proper material.Compared to the carpenters in the past, modern carpenters are__________.
| A．more successful | B．more learned |
| C．more imaginative | D．more hardworking |
What does the underlined word “they” (paragraph2) refer to?
| A．Carpenters who are fond of oak stairways. |
| B．Carpenters who have college degrees. |
| C．people who think highly of carpenters of old |
| D．people who think that modern material is of low quality. |
What does the third paragraph mainly discuss?
| A．People in the past preferred to use oak to build stairways. |
| B．It is now expensive to employ a carpenter. |
| C．Modern houses last as long as the old one. |
| D．Good carpenters still exist in modern times. |
What would be the best title for the text?
| A．Is Craft Dead? |
| B．Craft, Back to Life? |
| C．History of Craftsmanship |
| D．Carpenters Today and Yesterday |
Cleverness is a gift while kindness is a choice．Gifts are easy—they’re given after all．Choice can be hard．
I got the idea to start Amazon 16 years ago．I came across the fact that the Internet usage was growing at 2300 percent per year．I’d never seen or heard of anything that grew that fast，and the idea of building all online bookstore with millions of titles was very exciting to me. I had just turned 30 years old，and I’d been married for a year．I told my wife MacKenzie that I wanted to quit my job and go to do this crazy thing that probably wouldn’t work since most start-ups don’t and I wasn’t sure what to expect．MacKenzie told me I should go for it．As a young boy，I’d been a garage inventor．I’d always wanted to be all inventor，and she wanted me to follow my passion．
I was working at a financial firm in New York City with a bunch of very smart people and I had a brilliant boss that I much admired．I went to my boss and told him I wanted to start a company selling books on the Internet．He took me on a long walk in Central Park，listened carefully to me，and finally said，“That sounds like a really good idea，but it would be an even better idea for someone who didn’t already have a good job．”That 1ogic made some sense to me，and he convinced me to think about it for 48 hours before making a final decision．Seen in that light,it really was a difficult choice，but finally，I decided I had to give it a shot．I didn’t think I’d regret trying and failing．And I suspected I would always be haunted by a decision to not try at all.
After much consideration ，I took the less safe path to follow my passion ，and I’m proud of that choice．For all of us，in the end，we are our choice．What inspired the author with the idea of building an online bookstore?
| A．His dream of being an inventor． |
| B．The support of his wife． |
| C．The greatly increasing usage of the Internet． |
| D．Millions of exciting titles, |
Which of the following is closest in meaning to the underlined sentence?
| A．The idea of not trying would keep coming to his mind and disturb him． |
| B．He would be very excited if he tried it out． |
| C．Be would be always having a doubt if he didn’t try． |
| D．The decision to not try the online bookstore would terrify him． |
Which of the following would be the best title for the passage?
| A．Cleverness and Kindness | B．The Starting of Amazon |
| C．Following My Passion | D．We Are What We Choose |
We can know from the passage that_______．
| A．the boss thought the idea was suitable for the author |
| B．the author wanted someone else to try the idea |
| C．the author might not regret if he failed the idea |
| D．the author might go back to his boss if he failed |