When prices are low，people will buy more，and when prices are high，they will buy less．Every shopper knows this．But at the same time，producers want higher prices for their goods when they make more goods．According to the economic（经济的）point of view，changes in the prices of goods cause changes in supply and demand． As is shown in the graph（图表），people buy fewer shoes as the price of shoes goes up．On the contrary，a decrease in the price causes an increase in demand．
Business firms look for the perfect price at which the largest profits（利润）can be made．If the price of the shoes goes up to 50，the consumers（消费者）will not buy all of 3，000 shoes．The producers will have a surplus（剩余）of 2，000 shoes and they can only get 50，000．If the price of the shoes is lowered to10，as many as 5，000 shoes can be sold．Still，only 50，000 is made．
1．According to this article，the main idea of the first paragraph is that ____ ．
A．the lower the price is，the less people will buy
B．producers want to make more money by making fewer goods
C．every shopkeeper knows the price for goods
D．how changes in prices of shoes affect the number of shoes sold
2．From the passage，we can conclude that ____ is the best price for the producers to sell the shoes which are worth the highest price．
A.30 B.20 C.10 D.50
A teenager who is preparing to go to high school has probably heard all kinds of different things about high school freshmen from his parents , fiends , or old brothers and sisters. The change from middle school to high school can seem like a frightening experience for teens going into high school , but it is not always so hard as it may seem. Usually , middle school students can get used to high school life within a few months of their freshman year. A few tips for high school freshmen are as follows.
Grades are important . While it is important for a student to try to do his best in school , the grades that he gets in high school are even more important , since they are what colleges will look like when considering his application (申请)for their school .
Classes . The classes a freshman takes throughout his whole high school can help them a lot when he gets ready to go to college or look for a job . Some special classes allow students to get college credits（学分）while they are still in high school in some countries . Most high school classes will have more homework than middle school classes and this can be a hard adjustment (适应) at first .
Being prepared . Middle school classes might not request students to prepare very much before they attend them . But high school teachers will expect students to get everything ready before the class begins .It is also important for students to study for tests and do all homework that is required during class.
Making good choices. Most high school students have more freedom than middle school students, but what a student does with this freedom is very important to his future life for many years after high school is over. Peer pressure（同龄人压力）, while it can be good sometimes, is often a problem with younger teens .It is important for a teen to make good choices throughout his high school career so that he can be successful later on in his life .
High school is a memorable experience for teenagers .They should not be afraid of becoming a freshmen . After studying for a period of time , they will surely enjoy it. The first paragraph mainly tells readers that _________.
| A．It is necessary for teens to worry about something |
| B．there are few differences between high school and middle school |
| C．teens are too worried to go to high school |
| D．It is not so difficult for teens to get used to high school life |
According to the passage , which of the following is right ?
| A．The grades in middle school are not important |
| B．All the classes don’t allow the students to get credits in high school in some countries |
| C．A teenager may hear things about high school from their teachers |
| D．What a teen does with his freedom in high school has nothing to do with his college life. |
What will be considered when a college decides whether to accept a student’s application or not ?
| A．His choice in middle school |
| B．His unforgettable experience in high school |
| C．His grades in high school |
| D．His college credits in high school |
The passage suggests that ________.
| A．The teens don’t always have a problem with peer pressure |
| B．If a teen makes good choices in his high school , he will surely succeed in later life |
| C．The life in high school is less difficult than it looks |
| D．A teen needn’t be worried about his high school life because everything will be exactly the same as before. |
Donald Watson was a man who thought very much about the food he ate. He was born in yorkshire， England , in September 1910. And he died in November 2005, at the age of 95. That is a very great age. Watson explained that it was because he never ate any food from animals.
When he was a boy , Watson stayed on a farm. .He loved to see the animals. He said that they gave so much to people. And all the animals were so friendly. Then , one day , he saw a man killing a pig . He was very sad. . From then on, Watson decided that he would never again eat meat . Twenty years later he decided that he wouldn’t eat anything from animals, such as milk, cheese or eggs. He became vegan (素食主义者).
Watson formed a group called “The Vegan Society”. In its newspaper, The Vegan Society thought it was terrible and wrong to eat food from animals. At first, there were not many people who agreed with him . They thought it was crazy to do it .Most people thought it was too difficult and unhealthy. However, over time , more and more people began to agree with Watson and The Vegan Society.
People become vegans for many reasons. Watson and his friend stopped eating because they loved animals. They believed that it was wrong to hurt another living thing .
Now, people also become vegans for environmental reasons. Keeping animals takes a lot of resources(资源)， including water and food. Also, in some places, people are cutting down trees to create more land for cows. By avoiding food from animals, vegans hope to protect these forest areas.
Finally, just like Watson, some people believe that being a vegan is healthier. They believe that food from animals causes heart problems, a high body weight and many other health problems. We know from the text that Watson __________.
| A．lived a very long life |
| B．refused to eat meat at 20 |
| C．helped kill a pig on a farm |
| D．enjoyed good food very much |
The underlined word “it’ in paragraph 3 means “ ________”.
| A．agreeing with Watson |
| B．publishing a newspaper |
| C．forming “The Vegan Society” |
| D．avoiding all food from animals |
Watson refused to eat meat ______.
| A．because of his love of animals |
| B．because of environmental reasons |
| C．because he had a lot of health problems |
| D．because keeping animals needs lots of resources |
What’s the best title (标题)for the text?
| A．Donald Watson : a new way to eat |
| B．Animal protection in England |
| C．The Vegan Society：a special group |
| D．Healthy eating habits |
You probably know that frogs hop ( 双足跳 ). But did you know that there’s a small frog in the Pacific Northwest that bellyflops（肚子先着水）? It’s called a tailed frog.
Dr.Rick Essner, who has been studying tailed frogs for the past few years, says, “ I’ve looked at thousands of jumps and have never seen them land on their feet like other frogs.” Most of the time, tailed frogs land on their stomachs and then bring their back legs in to prepare for another jump.
Essner forst noticed these frogs because of the way they swim. Other frogs kick both of their back legs at the same time. But when a tailed frog swims, it pushes first with one leg and then the other.
To try to find out why tailed frogs bellyflop, Essner and other scientists collected and filmed different kinds of frogs. They found that all of the frogs start their jumps the same way: they hold out their legs. The change comes in the landing. Tailed frogs can't move their back legs as quickly as other frogs do. Maybe they don’t need to. Tailed frogs live around water and quickly jump into the water to escape danger.
Early frogs developed around watery areas and could jump quickly into the water to escape danger. Scientists think those frogs blended in with (与…融合在一起) the green plants on the side of the rocky rivers, just like today’s tailed frogs. “Ｉwould guess that other animals would have problems detecting them, ” explains Essner. When other animals find those early frogs, the frogs could jump into the river. They didn’t need to continue hopping.
Tailed frogs and other kinds of frogs went their own ways about 200 million years ago. Tailed frogs stayed by rivers. Other kinds of frogs moved to places where new hopping skills allowed them to survive. What’s special about the detailed frog ?
| A．It has a long tail |
| B．It jumps on one foot |
| C．It stars its jump differently |
| D．It lands differently from other frogs. |
Why do tailed frogs bellyflop?
| A．They have never left the water to live . |
| B．They have trouble in holding out their legs |
| C．Their back legs can’t catch up while jumping.. |
| D．Their front legs develop better than the back ones. |
The underlined word “detecting” in Paragraph 5 means “______”.
| A．eating | B．killing |
| C．using | D．discovering |
When they are in danger, the detailed frogs would _________.
| A．jump into the water for protection |
| B．hop around quickly |
| C．hide in the green plants near the river |
| D．jump into the rock |
It is natural that young people are often uncomfortable when they are with their parents . They say their parents don’t understand them .They often think that their parents are out of touch with modern ways , that they are too serious(严肃) — too strict with their children and that they seldom give their children a free hand . It is true that parents often find it difficult to win their children’s trust(信任) and they often forget how they themselves felt when they were young .
For example , young people like to act on the spot without much thinking . It is one of their ways to show they have grown up and that they can face any difficult situation . However , older people worry more easily . Most of old people plan things ahead , at least in the back of their minds , and do not like their plans to be upset by something unexpected .
When you want your parents to let you do something , you will have better success if you ask before you really start doing it .
Young people often make their parents angry with their choices in clothes and in music . But they do not want to cause any trouble ; it is just that they feel cut off from the older people’s world , into which they have not yet been accepted . That’s why young people want to make a new culture of their own . And if their parents do not like their music or hairstyle or clothes or their ways of speech , this will make the young people very happy .
Sometimes you are so proud of yourself that you do not want your parents to say “yes” to what you do . All you want is to be left alone and do what you like . It is natural enough , after being a child for so many years , when you were completely under your parents’ control .
If you plan to control your life , you’d better win your parents over and try to get them to understand
you. If your parents see that you have a high sense of responsibility , they will certainly give you the right to do what you want to do .Whom is this text written for ?
| A．Parents |
| B．Both parents and their children |
| C．Young people |
| D．Teachers |
The underlined expression “on the spot ” means ______ .
| A．at the place where something happened. |
| B．by oneself |
| C．immediately |
| D．angrily |
According to the text , young people usually ______ .
| A．ask for advice before they really start to do anything |
| B．do things without thinking carefully ahead |
| C．are very strict with themselves |
| D．think in the same way as their parents do |
Why do young people like to have clothes and music in their own way ?
| A．Because they want to make their parents angry . |
| B．Because they try to get their parents into trouble . |
| C．Because they want to try something new and look different from the older people . |
| D．Because they know they are cleverer than the older people . |
Remembering names is an important social skill . Here are some ways to improve it．
Remember and repeat in conversation . When you hear a person’s name , repeat it.
Immediately say it to yourself several times without moving your lips . you could also repeat the name in a way that sounds natural．
Ask the other person to recite and repeat . You can let other people help you remember their names. After you’ve been introduced to someone , ask that person to spell the name and pronounce it correctly for you . Most people will be glad by the effort that you’re making to learn their names.
Admit(承认) that you don’t know .You may tell them that you can’t remember someone’s name . Most of them will feel glad if you say, “I’m working to remember your names better . Yours is right on the tip of my tongue . What is it again?”
Use associations(联想). Link each person yon meet with one thing you find interesting or unusual．
For example, you can remember in this way : “Vicki Cheng ——tall, black hair.” To remember their names , you can write them on a small card as soon as possible.
Limit the number of new names you learn at one time. When meeting a group of people, you’d better remember just two or three names. Free yourself from remembering every one. Few of the people expect you to remember their names. Another way is to limit yourself to learning just first names. Last names can come later.
Go early . Consider going early to meetings , parties and classes . Sometimes just a few people show up on time . There’re fewer names for you to remember. And as more people arrive , you can hear them being introduced to others . How will most people feel when you try hard to remember their names?
| A．They will be moved to tears. |
| B．They will be surprised. |
| C．They will feel pleased. |
| D．They will be upset. |
If you can't remember someone's name, you may ______.
| A．tell him the truth |
| B．tell him a white lie |
| C．ask him for pity |
| D．say you don’t know him |
When you meet a group of people, it is better to remember _____ .
| A．all their names |
| B．a few names first |
| C．just their last names |
| D．as many names as possible |
What does the text mainly tell us?
| A．Suggestions on an important social skill. |
| B．Importance of attending parties. |
| C．How to make use of associations. |
| D．How to remember and repeat names in conversation. |
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