Bats are the only mammals that can fly a great distance， but they have another ability． Many bats live a very long time for an animal their size．
European researchers are studying bats to understand why they live so long． They hope to make discoveries to fight the aging process （过程） in human beings．
Last week， the group of scientists said they had found important biological qualities in some bat species． The group studied bat chromosomes （染 色 体）， a line of genes found in the nucleus（核） of cells． The scientists were most interested in parts connected to the ends of the chromosomes． They are called telomeres（端 粒）． Telomeres protect the ends of chromosomes， which shorten each time a cell divides． Scientists believe this shortening process causes cells to break down． ．
A report on bats was published this month in the journal Science Advances．
Among the leaders of the study was Emma Teeling， a biologist with University College Dublin in Ireland． Teeling said studying long﹣living mammals that have developed ways to fight aging "is another way to prove the molecular（分 子） basis of extended ‘health length．'" She added that studying bats made scientists able to learn more about the processes "that drive healthy aging．"
The European researchers studied 493 bats from four bat species． The group used information that had been gathered over more than 60 years． Of these animals， the greater mouse﹣eared bat generally lived the longest， an average of 37 years．
The scientists said this and a related species， which are grouped together under the name Myotis， had telomeres that did not shorten with age． Another Myotis bat holds the record for oldest age， reaching 41 years．
The scientists' findings suggest that these bats' cells have the ability to keep and repair their telomeres． This， they said， helps guard against the aging process． Based on its body size， a bat like the greater mouse﹣eared bat would be expected to live four years． But， these mammals have been found to live nearly 10 times longer than that．
The scientists found that Eighteen of these are bats． The only exception is an unusual African rodent， the naked mole rat．
（1）Which sentence can be put at the end of Paragraph 3？
A．This makes scientists able to study bats．
B．That's why bats can fly a great distance．
C．They say this is what causes aging．
D．They discover the cells connected to humans．
（2）Why do some species of bats live a very long time？
A．Because they have a line of long﹣living genes out of the cells．
B．Because their cells have the ability to keep and repair their telomeres．
C．Because they have another ability to live longer without any food or water．
D．Because telomeres protect the ends of chromosomes to stop cells dividing．
（3）The underlined word "that" refers to ．
A．four years
B．body size
C．the aging process
D．the ability to repair
（4）What's the best title of the passage？
A．Differences Between Long﹣Living Animals
B．A Science Report on Chromosomes
C．Do Bats Hold the Secret to Long Life？
D．Are Humans and Bats Similar in Protecting Themselves？
根据短文内容，选择正确答案
Liu Yun, 13, pretty and smart. She is a good student. But many students try to stay from her because Liu Yun’s mum has AIDS(爱滋病) and her father has died of AIDS. Luckily, Liu Yun didn’t get it.
AIDS means fear for most people. Nobody wants to play games with her. Even a teacher who used to like her turns his back on her now. The biggest problem is how other people look at her. She sometimes wants todrop out of schoolbecause she can no longer face others’ indifference(冷漠)。
It is said if a person has AIDS, it’s still safe to eat and play with him. So I think Liu Yun’s classmates and teachers are afraid of AIDS because they don’t know much about AIDS. And Liu Yun needs their love and understanding. Even a friendly smile means a lot to her.Why isn’t Liu Yun popular with the students and the teachers?
A. She has AIDS. B. Her mother has AIDS.
C. Her father has died of AIDS. D. Both B and C.What will you do when you best friend has AIDS?
| A．I’ll stay away from him. |
| B．I won’t have meals with him. |
| C．I won’t talk with him. |
| D．I should be more friendly to him than before. |
What’s the meaning of the underlined words “drop out of school”?
| A．逃学 | B．辍学 | C．请病假 | D．回家 |
Can we have meals with the people that have AIDS?
| A．Yes, we can. | B．No, we can’t. |
| C．No, we shouldn’t. | D．We don’t know. |
Which of the following is TURE?
| A．Though Liu Yun’s mother has AIDS, every teacher still love her. |
| B．None of teachers love her after her mother has AIDS . |
| C．Most of teachers love her after her mother has AIDS. |
| D．Only a few teacher love her when her mother has AIDS. |
阅读短文，判断正(T)误(F).
I was in town yesterday. I decided to stop at the bank to see Jane. I thought she might have time to go for lunch with me.
When I got to the bank, they told me she had just been out. I asked them if she would be back by 10:30 or 11:45, and they told me “Yes”. I had some time, so I decided to wait for her. I walked over to take a seat by the window. I watched everyone coming in. It was 12:30, and I was sure she couldn’t come back until after lunch. I got up, and as I started to walk to the door, someone called my name. I turned around and was surprised to find it was Jane. She said she had not left her office all the morning. Yesterday I was in a city.
I wanted to have lunch with Jane.
Jane was in her office all the morning.
I didn’t wait Jane any more.
In fact, Jane’s workmates made a mistake.
根据短文内容回答问题。
Red Ribbon Week is held every year, usually during the last week of October. It started with a police officer named “Kiki” Camarena. He was sent to Mexico in order to investigate(调查) a Mexican drug company and stayed there for four and a half years. His efforts helped put a stop to several major drug making companies. So the bosses wanted to murder the men who brought them down. When Camarena left his office for a lunch date with his wife on February 7, 1985, a car drove up and kidnapped(绑架) him, and a month later he was killed. At that time he was only 37 years old.
Shortly after his death, people in Camarena’s town began wearing red ribbons in his honor. Then Camarena’s high school friend, Henry Lozano, started Camarena Club. Hundreds of people joined the club and promised to be drug-free in order to honor the death of Camarena. And then schools in several states began to join in. Now, at the end of every October, millions of Americans wear red ribbons in memory of “Kiki” Camarena. So, in 1988, the first national Red Ribbon Week was founded in America.
Red Ribbon Week has become the largest drug education and prevention organization in the United States. It encourages communities to stand up against drugs and it encourages children to make a promise not to take drugs in their life. 
Is Red Ribbon Week held at the end of October in America?
How long did “Kiki” Camarena stay in Mexico?
What did “Kiki” Camarena do there?
Why do people wear red ribbon during Red Ribbon Week?
What’s the passage mainly about?
The ocean can be a great place to swim and play, it may also be useful in another way. Some scientists think that waves could help make electricity.
“Have you ever been on a surfboard or boat and felt yourself being lifted up by a wave?” asked Jamie Taylor of the Wave Energy Group in Scotland. “There is certainly a lot of energy in waves.”
Scientists are working on using that energy to make electricity. The United States and a few other countries have started doing research on wave energy, and it is already being used in Scotland.
Most waves are created when winds blow across the ocean. “The winds start out by making little ripples (波纹) in the water, but if they keep on blowing, those ripples get bigger and bigger and turn into waves,” Taylor said. “Waves are one of nature’s ways of picking up energy and then sending it off on a journey.”
When waves come towards the coast, people can set up dams(大坝) to block the water and send it through a large wheel called a turbine(涡轮). The turbine can then power an electrical generator(发电机).
We will never run out of wave power. Besides, wave energy does not create the same pollution as oil and coal do.
Oceans cover three quarters of the earth’s surface. That would make wave power seem perfect for creating energy around the world. But there are some disadvantages that need us to pay more attention to.
Jamie Taylor said that wave power still cost too much money. He said that its influence on animals in the sea is still unknown. Besides, wave power would get in the way of fishing and boat traffic.
With more research, “Many of these problems might be solved,” Taylor said. “Finding more energy sources(资源) is very important, for traditional sources of energy like oil and gas may run out some day.”
In the future, when you turn on a light button, an ocean wave could be providing the electricity! 
We can learn from the passage that__________________.
| A．almost every country is making use of the wave power at present |
| B．it is necessary for us to develop wave power instead of oil and coal |
| C．wave power will be sure to make some bad influence on sea animals |
| D．scientists are making efforts to find new ways of fishing and boat traffic |
What does the fourth paragraph tell us?
| A．Why scientists are doing the research on wave power. |
| B．What experience that scientists have achieved so far. |
| C．How the wave energy forms and grows bigger. |
| D．Which countries are trying out wave power. |
What’s the writer’s attitude towards wave power?
| A．The writer believes that wave power will be used widely by man. |
| B．The writer doubts if wave energy can be changed into electricity. |
| C．The writer is sure the experiments will come to the end some day. |
| D．The writer thinks that wave power isn’t worth researching at all. |
What can be the best title for the passage?
| A．Sea Animals and Wave Power. |
| B．How Do We Get Wave Energy? |
| C．The Advantages of Wave Power. |
| D．Can Waves Make Electricity? |
I love my iPhone---it’s my little connection to the larger world that can go anywhere with me. I also love my computer, as it stores all of my writing and thoughts. Though I love these devices(装置) of technology, I know that there are times when I need to move away from them and truly communicate with others.
I teach history in a high school. My goals for the class include a full discussion of historical themes(主题) and ideas. Because I want students to thoroughly study the material and share their ideas with each other in the classroom. I have a rule---no computers, iPads, phones, etc. When students were told my rule before class, some of them were not happy at all.
Most students think that my reasons for this rule include unpleasant experiences in the past with students misusing technology. There’s a bit of truth to that. Some students believe that I am anti-technology. There’s no truth in that at all. I love technology and try to keep up with it so I can relate to my students.
The real reason why I ask students to leave technology at the door is that I think there are very few places in which we can have deep conversations. Interruptions(打断) by technology often break concentration and allow for too much dependence on outside information for ideas. I want students to dig deep within themselves for ideas. I want them to push each other to think differently and to make connections between the course material and the class discussion.
I’ve been teaching my history class in this way for many years and students realize that with deep conversation, they learn at a level that helps them keep the course material beyond the classroom.
I’m not saying that I won’t ever change my mind about technology use in my history class, but until I hear a really good reason for the change. A few hours of technology-free dialogue is just too sweet to give up.What’s the second paragraph mainly about?
| A．The reasons why students should use computers or iPads in class. |
| B．The advantages of using cell phones and computers in the classroom. |
| C．What the writer is trying to do and what rule has been made in class. |
| D．A new learning style that the teacher enjoys using in history class. |
According to the writer, the use of technology in the classroom may _____.
| A．improve teaching and offer more help |
| B．allow students to get on well with each other |
| C．help students concentrate on what they learn |
| D．keep students from making deep conversations |
What can we infer from the passage?
| A．The teacher will carry on the success in the future. |
| B．The teacher will have to cancel the rule in class. |
| C．Some students will be punished according to the rule. |
| D．More and more students will be absent in history class. |
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