The color red often means danger --- and by paying attention, accidents can be prevented. At railroad crossings, flashing red fights warn cars to stay back. A red light at a traffic crossing tells cars to stop, so they don't run into other cars.
In the future, the color red also may help prevent danger at construction sites. Thanks to new work by engineers, bridge supports --- or other kinds of materials --- could one day contain a color-changing material. It will turn red before a structure collapses(倒塌) or falls apart.
The secret behind the color-changing material is a particular type of molecule(分子). Molecules come in all shapes and sizes, and make up everything you can see, touch or feel. How a molecule behaves depends on what kinds of atoms(原子) it contains, and how they're held together.
To get a rough picture of one way atoms are held together in a molecule, imagine you and your friends standing in a large circle, holding hands. Each person represents one atom, your clasped hands represent the bond, and the entire circle represents a molecule.
The molecule being used to turn the material red is called mechanophore(机械响应性聚合物). When one chemical bond in the mechanophore molecule breaks, the rest of the molecule turns red.
There is a way to get rid of~ the red color: light. When a bright light is shone on the mechanophore, the broken bond is fixed and the red color disappears. This "self-healing" may be a problem for engineers who want to use the color-changer in big construction projects that will be outside, in the sunlight. And if bright light keeps the red color from appearing, then the mechanophore's warning system will be useless.
Scientists still have a lot of work to do before the color-changing molecules can be used outside the lab. If mechanophore can be used in the real world, they are suggested to be employed in a new kind of paint.The first paragraph mainly tells us __________.
| A．the color red is widely used in our life |
| B．how to prevent car accidents |
| C．the color is an important signal of warning |
| D．how to use color red |
The color red will be used at construction sites to _________.
| A．tell different materials used in the building |
| B．warn people that the building is dangerous |
| C．make the building more beautiful |
| D．tell people the building is under construction |
The example given in the fourth paragraph is to show _________.
| A．the way atoms are held together in a molecule |
| B．how a molecule behaves in an object |
| C．how to play an old game |
| D．how people get along with each other |
What can make the mechanophore’s warning system ineffective?
| A．Paints | B．Water | C．Poor building materials | D．The bright light |
Read the following advertisements and then choose the correct answers.
| (China Daily, March 3, 1996) the biggest shopping center will open on March 8. Every body with today's China Daily will get a small present that day. You are welcome. Telephone: 38990688; address: No. 6 Xidan Road …… |
| (ENGLISH NEWSPAPER, March 19) English Newspaper needs a foreign editor. He (She ) must have worked in China for more than 2 years. British nationality is necessary. The salary is $ 100,000 a year. The term is 3 years. In ten days this piece of advertisement will not be useful. Telephone: 3890666; addreses: No. 6 Xinling Road … |
| (CHINA FOOTBALL, February 3, 1996) Shanghai Shenhua Team Vs Beijing Guo'an Team TIME: February 8. Sunday (3:00) PLACE: Hongkou Stadium TICKET PRICE; RMB 25 yuan (for adults ) RMB 15 yuan (for students) NAME: China Cup Football Contest COACHES: Xu Genbao, Jin Zhiyang … |
If an Englishman who has worked in China for 3 years comes to English Newspaper office to ask for the job in April, he will _____.
| A．get the job | B．not get the job | C．be a good editor | D．not be useful |
If three adults and six students went to watch the match, the tickets would cost them _____ yuan.
| A．165 | B．135 | C．196 | D．255 |
Which of the following is NOT TRUE?
| A．The shopping center is at NO. 6 Xidan road. |
| B．The telephone number of English Newspaper is 3890666. |
| C．The match was between Beijing Team and Guo'an Team. |
| D．Xu Genbao is a coach. |
Computers are very important to modern life．Many people think that in the future computers will be used in lots of everyday life．It is thought that we won’t have to go shopping because we will be able to get most things which are sold in shops on the Internet．There will be no more books because we will be able to get all texts from computers．The Internet will be used to play games, see films and buy food．Most telephone calls will be made by computers, too．
Some people are glad about those new ways of shopping and communicating(交流)．Others do not think that computers will replace（代替）our old ways．
Some people think that one day we will not read books made of paper. Instead, we will buy and read books using computers, which will keep many different books in them at the same time．We won’t need to turn lots of pages and paper will be saved．Computerized (计算机化的) books will be used more and more．
While many people say it is a pleasure to go into shops and look at things you want to buy．It is also unlikely that many people will want to read large texts on our computers. Because paper books will perhaps be more friendly．Maybe computers won’t change these two habits．Which is the main idea of this passage?
| A．People like going shopping | B．Reading books is important |
| C．Computers are important | D．Computer can be used to play games |
.There will be no more books because________.
| A．There is no paper in the future. | B．People don’t like reading books. |
| C．They are very expensive. | D．We can read passages from computers. |
Which of the following is TRUE?
| A．We can see films by computers. | B．People all like to go shopping by computers. |
| C．We can’t buy anything using computers. | D．All the people like reading books from computers. |
Which of the following is mentioned (提到) in the passage?
| A．Computers can help us e-mail our friends. | B．We can chat by using computers. |
| C．Computers can help us make telephone calls. | D．We can listen to the music by computers. |
Everyday we go to school and listen to the teacher, and the teacher will ask us some questions. Sometimes, the classmates will ask your opinions of the work of the class. When you are telling others in the class what you have found out about these topics, remember that they must be able to hear what you are saying. You are not taking part in a family conversation or having a chat（闲谈）with friends—you are in a slightly unnatural situation where a large group of people will remain silent, waiting to hear what you have to say. You must speak so that they can hear you—loudly enough and clearly enough but without trying to shout of appearing to force yourself.
Remember, too, that it is the same if you are called to an interview whether it is with a professor of your school or a government official who might meet you. The person you are seeing will try to put you at your ease（轻松）but the situation is somewhat（一点儿）different from that of an ordinary conversation. You must take special care that you can be heard.When you speak to the class, you should speak ________.
| A．as loudly as possible | B．in a low voice |
| C．loudly | D．forcefully |
Usually, when you speak to the class, the class is __________.
| A．noisy | B．quiet | C．having a rest | D．serious |
The situation in the class is ________ that in your house.
| A．not very different from | B．sometimes the same as |
| C．sometimes not the same as | D．not the same as |
If you are having a conversation with an official, the most important thing for you is _______.
| A．to show your ability | B．to be very gentle |
| C．to make sure that you can be heard | D．to put the official at ease |
The main idea of this passage is ________.
| A．that we must use different ways at different situations |
| B．that we must speak loudly |
| C．that we must keep silent at any time |
| D．that we must talk with the class |
I found out one time that doing a favor for someone could get you into a lot of trouble. I was in the eighth grade at the time, and we were having a final test. During the test, the girl sitting next to me whispered something, but I didn’t understand. So I leaned over her way and found out that she was trying to ask me if I had an extra pen. She showed me that hers was out of ink and would not write. I happened to have an extra one, so I took it out of my pocket and put it on her desk.
Later, after the test papers had been turned in, the teacher asked me to stay in the room when all the other students were dismissed（解散）. As soon as we were alone she began to talk to me about what it meant to grow up; she talked about how important it was to stand on your own two feet and be responsible (负责任) for your own acts. For a long time, she talked about honesty and emphasized（强调） the fact that when people do something dishonest, they are really cheating（欺骗） themselves. She made me promise that I would think seriously（认真地） about all the things she had said, and then she told me I could leave. I walked out of the room wondering why she had chosen to talk to me about all those things.
Later on, I found out that she thought I had cheated on the test. When she saw me lean over to talk to the girl next to me, it looked as if I was copying answers from the girl’s test paper. I tried to explain about the pen, but all she could say was it seemed very very strange to her that I hadn’t talked of anything about the pen the day she talked to me right after the test. Even if I tried to explain that I was just doing the girl a favor by letting her use my pen, I am sure she continued（继续） to believe that I had cheated on the test. The story took place（发生） exactly ____ .
| A．in the teacher’s office | B．in an exam room |
| C．in the school | D．in the language lab |
The girl wanted to borrow a pen, because ____ .
| A．she had not brought a pen with her | B．she had lost her own on her way to school |
| C．there was something wrong with her own | D．her own had been taken away by someone |
The teacher saw all this, so she asked the boy ____ .
| A．to go on writing his paper | B．to stop whispering |
| C．to leave the room immediately | D．to stay behind after the exam |
The thing(s) emphasized in her talk was(were) ____ .
| A．honesty | B．sense of duty | C．seriousness | D．all of the above |
The boy knew everything ____ .
| A．the moment he was asked to stay behind | B．when the teacher started talking about honesty |
| C．only some time later | D．when he was walking out of the room |
So long as teachers fail to distinguish between teaching and learning , they will continue to undertake to do for children that which only children can do for themselves. Teaching children to read is not passing reading on to them. It is certainly not endless hours spent in activities about reading. Douglas insists that“ reading cannot be taught directly and schools should stop trying to do the impossible”.
Teaching and learning are two entirely different processes. They differ in kind and function. The function of teaching is to create the conditions and the climate that will make it possible for children to devise the most efficient system for teaching themselves to read. Teaching is also public activity. It can be seen and observed.
Learning to read involves all that each individual does to make sense of the world of printed language. Almost all of it is private ,for learning is an occupation of the mind ,and that process is not open to public scrutiny.
If teacher and learner roles are not interchangeable ,what then can be done through teaching that will aid the child in the quest（探索）for knowledge? Smith has one principal rule for all teaching instructions. “Make learning to read easy, which means making reading a meaningful, enjoyable and frequent experience for children. ”
When the roles of teacher and learner are seen for what they are, and when both teachers fulfill them appropriately, then much of the pressure and feeling of failure for both is eliminated. Learning to read is made easier when teachers create an environment where children are given the opportunity to solve the problem of leaning to read by reading.
The problem with the reading course as mentioned in the first paragraph is that ________.
| A．it is one of the most difficult school courses |
| B．students spend endless hours in reading |
| C．reading tasks are assigned with little guidance |
| D．too much time is spent in teaching about reading |
The teaching of reading will be successful if ________.
| A．teachers can improve conditions at school for the students |
| B．teachers can enable students to develop their own way of reading |
| C．teachers can devise the most efficient system for reading |
| D．teachers can make their teaching activities observable |
The underlined word“ scrutiny” most probably means“________”.
| A．inquiry | B．observation |
| C．control | D．suspicion |
According to the passage, learning to read will no longer be a difficult task when ________.
| A．children become highly motivated |
| B．teacher and learner roles are interchangeable |
| C．teaching helps children in the search for knowledge |
| D．reading enriches children’s experience |
The main idea of the passage is that ________.
| A．teachers should do as little as possible in helping students learn to read |
| B．teachers should encourage students to read as widely as possible |
| C．reading ability is something acquired rather than taught |
| D．reading is more complicated that generally believed |
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