What makes it rain? Rain falls from clouds for the same reason anything falls to Earth. The Earth's gravity pulls it. But every cloud is made of water droplets or ice crystal(冰晶). Why doesn't rain or snow fall constantly from all clouds? The droplets or ice crystals in clouds are extremely small. The effect of gravity on them is slight. Air currents move and lift droplets so that the net downward amount of water is zero, even though the droplets are moving constantly.
It can be seen that droplets and ice crystals behave somewhat like dust in the air in a beam of sunlight. To the casual observer, dust seems to act in a totally random fashion, moving about
without fixed direction. But in fact dust particles（分子） are much larger than water droplets and they finally fall. The average size of a cloud droplet is only 0.0004 inch in diameter（直径）. It is so small that it would take sixteen hours to fall half a mile in perfectly still air, and 
it
doesn't fall out of moving air at all. Only when the droplet grows to a diameter of 0.008 inch or larger can it fall from the cloud. The average raindrop contains a million times as much water as a tiny cloud droplet. The growth of a cloud droplet to a size larger eno
ugh to fall out is the cause of rain and other forms of precipitation. This important growth process is called "coalescence". Ice crystals do NOT immediately fall to Earth because .
| A．they are kept up by air currents |
| B．most of them change into steam |
| C．they combine with other chemicals in the atmosphere |
| D．their electrical charges draw them away from the earth |
The underlined word "random" in line 10 most probably means .
| A．unpredictable | B．strict | C．independent | D．abnormal |
What can be inferred about drops of water larger than 0.008 inch in diameter?
| A．They never occur. |
| B．They are not affected by the force of gravity. |
| C．In moving air they would fall to earth. |
| D．In still air they fall a speed of thirty-two miles per hour. |
How much bigger is the rain drop than a loud droplet?
| A．200 times bigger |
| B．1,000 times bigger |
| C．100,000 times bigger |
| D．1,000,000 times bigger |
When you put down your pens at the end of the college entrance exam, 12 hard years of study will have come to an end. Forget your studies for a while. It's time to enjoy yourselves!
There are many ways to celebrate this special month of graduation. You can have photos taken with your classmates and teachers, or dine out together and exchange gifts.
High school students in Western countries such as the United States and Canada usually have a prom to mark their graduation. It's to mark the time kids turn into young men and women. After the prom, teenagers either go to college or find a job. It means they are no longer as dependent on their parents as they were before.
At the prom, boys usually dress in dinner jackets and bow ties, though many different types of formal clothes are worn. Traditionally, girls give boys matching boutonnieres (a small collection of flowers they pin to their jackets). Girls traditionally wear formal dresses, or dress to shock or be noticed, in shiny or brightly colored materials.
Common prom activities include dining, dancing, the crowning (加冠) of a prom king and queen, and just talking to friends. In some cases, high school students collect funds for their class prom through the four years of their high school.
High schools in or near large cities may rent ballrooms at expensive hotels or, to be unusual, on a pleasure cruise boat.
But often costs are cut by simply using the school gym. Students make a lot of effort to decorate the gym to make the event special. The music played at the prom will be the most popular kinds, like rock and hip-hop.
The students elect the Prom Queen. She is partnered with a Prom King who is elected similarly. These are great honors that the pair takes very seriously. The two dance with each other to celebrate their election.
Sometimes teachers and parents also go to the prom. But others like to go with friends, to whom they are soon going to be saying goodbye.
If you like the idea of a prom, why don't you and your classmates organize one for your graduation?What does the word “prom” probably mean in the passage?
| A．a dancing competition. | B．a party held to celebrate graduation. |
| C．a fashion show. | D．an election. |
Which of the following is an economical way to hold the prom?
| A．renting a ballroom | B．taking a cruise boat |
| C．holding it in the school gym | D．wearing formal dresses |
Which of the following clearly indicates that prom is very important to students?
| A．They take pictures at the prom. | B．They wear formal clothes or special clothes. |
| C．Music is played at the prom. | D．Teachers and parents attend it. |
Why do some students attend the prom with their friends?
| A．They want to be elected by their friends us the Prom King or Queen. |
| B．They don’t like to be accompanied by their parents. |
C．They don’t want to depe nd on their parents. |
| D．They will part with their friends in a short time. |
| Take Action for a Better World: Volunteers Needed Six months’ preparation in Denmark: Africa studies, team work combined with social work with risk group teenagers. Six months’ community work in Malawi in People to People Projects: Child Aid, HIV / AIDS. Fights and Teacher Training. Qualifications: 18 years, hard working and social engagement. Please contact us by e-mail: takeaction@ betterworld.com. |
Part-time work with Exchange StudentsYOUTH International is a non-profit high school foreign exchange students organization. We welcome teenagers from over 80 countries worldwide and provide host families. The community Representative is a part-time position designed for people with a strong desire to do something rewarding in the community and earn some extra money. Applicants best suited for this work should enjoy teenagers, have a strong interest in cross-cultural communication and feel comfortable networking. Full training and support will be provided through branch offices throughout the US. Positions available in most states. If interested, please email staff@ youth.org or call 888—123—9872. |
| International Summer Job Hi, I’m an ESL student in China. I’m 20, quiet and polite, and I speak reasonable English. I’m looking for a summer job in an English-speaking country. I can teach Chinese or do house and garden work and cook Chinese dished. Can anybody offer me a job? I don’t need to earn much, just enough in two months (July—August) to pay for my return ticket to China. My goal is to improve my English and see a bit more of the world. My email is: ram3462@ hotmail.com. |
| Call for Native Speaker of English I am looking for native speakers of English to join in an experiment. This experiment is carried out over the Internet. You don’t need any specific knowledge other than understanding and speaking English at a native level. The first task will take you around 15 minutes. After this task, you can decide whether you want to continue the experiment. The tasks involve reading texts and designing questions and answers. If you are willing to help me, then please email us: club3864@ hotmail.com |
Who is suitable to work as a Community Representative in YOUTH International?
| A．One who enjoys working with teenagers from different countries. |
B．One who hopes to take action in fighting against disease s. |
| C．One who has a strong desire to improve his or her English. |
| D．One who wants to earn some pocket money in the program. |
Where will jack, a volunteer, receive the training before he is sent to work in Ma
lawi?
| A．In some local offices in the US. |
| B．In an ESL organization in China. |
| C．In a preparation program in Demark. |
| D．In an exchange student center in Africa. |
Mrs. Black in the US hopes to learn some Chinese at home, she may contact _______.
| A．takeaction@betterworld.com | B．ram3462@hotmail.com |
| C．club3864@hotmail.com | D．staff@youth.org |
What are volunteers for an experiment over the Internet supposed to do?
| A．To interview people online. | B．To do some housework. |
| C．To offer advice on Child Aid | D．To provide language exercises. |
Why do people buy art? To answer this question, ask yourself what your reasons are for thinking of getting a piece of art. An artwork can cost a large amount of money, but if it meets your needs, it’s worth every penny.
People buy art for many reasons. Many people buy an artwork simply because they like it, even if it is by an unknown artist. Art, as long as you enjoy it, is never a waste of money.
Art is for enjoyment. Art is meant to be shown. Don’t ever feel pressured into buying something you won’t enjoy looking at day after day, no matter what other people may say. Don’t buy something that doesn’t attract you just because it is trendy, or because the artist is famous, or because you have been advised that the artwork will make a good investment. If you don’t like the artwork at all, don’t buy it!
Art improves your environment. Have you ever noticed that all beautiful homes have art as an integral（必需的） part of the decoration? Art lends life and color to otherwise plain and ordinary walls. A well thought--out art collection will help create a unique atmosphere in your home and make it more attractive.
Art makes a statement. The kind of art you surround yourself with says much about your personality tastes and values. Art truly is a mirror of the soul.
Art enriches your life. Love--even the love of a work of art--contributes to healthier living and a longer lifespan (寿命). Art should enrich your life. Otherwise, why do you spend precious time and resources on it?
Just remember to select something which will appeal to your tastes, and keep to a sensible budget. Good art needn’t cost an arm and a leg.
Happy art collecting!What’s the purpose of the passage?
| A．To advise us to buy an expensive artwork. |
| B．To remind us to be sensible when buying an artwork. |
| C．To teach us how to choose works of art. |
| D．To explain the benefit of art to people. |
According to the author, what should you consider when buying a piece of art?
| A．Whether it brings pleasure to you. |
| B．Whether it is fashionable at present. |
| C．Whether you can profit from it in the end. |
| D．Whether it is created by a famous artist. |
Which of the following words best describes a work of art placed in a house?
| A．ordinary | B．attractive | C．necessary | D．unique |
The underlined sentence in Paragraph 5 means that ____.
| A．art can show what you look like |
| B．art is an expression of yourself |
| C．a mirror has a feature similar to art |
| D．a mirror can be a piece of true art |
Elizabeth Blackwell was born in England in 1821, and moved to New York City when she was ten years old. One day she decided that she wanted to become a doctor. That was nearly impossible for a woman in the middle of the nineteenth century. After writing many letters asking for admission(录取) to medical schools, she was finally accepted by a doctor in Philadelphia. She was so determined that she taught in school and gave music lessons to get money for the cost of schooling.
In 1849, after graduation from medical school. She decided to further her education in Paris. She wanted to be a surgeon(外科医师) , but a serious eye problem forced her to give up the idea.
Upon returning to the United States, she found it difficult to start her own practice because she was a woman. By 1857 Elizabeth and her sister, also a doctor, along with another woman doctor, managed to open a new hospital, the first for women and children. Besides being the first woman physician and founding her own hospital, she also set up the first medical school for women.Why couldn’t Elizabeth Blackwell realize her dream of becoming a surgeon?
| A．She couldn’t get admitted to medical school |
| B．She decided to further her education in Paris |
| C．A serious eye problem stopped her |
| D．It was difficult for her to start a practice in the United States |
How many years passed between her graduation from medical school and the opening of her hospital?
| A．Eight years | B．Ten years | C．Nineteen years | D．Thirty-six years |
According to the passage, all of the following are “firsts” in the life of Elizabeth Blackwell, except that she ______.
| A．became the first woman physician |
| B．was the first woman doctor |
| C．and several other women founded the first hospital for women and children |
| D．set up the first medical school for women |
Elizabeth Blackwell spent most of her life in _______.
| A．England | B．Paris | C．the United States | D．New York City |
Imagine, one day，getting out of bed in Beijing and being at your office in Shanghai in only a couple of hours，and then，after a full day of work，going back home to Beijing and having dinner there．
Sounds unusual，doesn't it? But it's not that unrealistic，with the development of China’s high-speed railway system．And that’s not all．China has an even greater high-speed railway plan — to connect the country with Southeast Asia，and eventually Eastern Europe．
China is negotiating to extend its own high-speed railway network to up to 17 countries in 10 to 15 years，eventually reaching London and Singapore．
China has proposed three such projects．The first would possibly connect Kunming with Singapore via Vietnam and Malaysia．Another could start in Urumqi and go through Kazakhstan and Uzbekistan，and possibly to Germany．The third would start in the northeast and go north through Russia and then into Western Europe．
If China’s plan for the high-speed railway goes forward，people could zip over from London to Beijing in under two days．
The new system would still follow China’s high-speed railway standard．And the trains would be able to go 346 kilometers an hour，almost as fast as some airplanes．
China’s bullet train（高速客车），the one connecting Wuhan to Guangzhou，already has the World’s fastest average speed．It covers 1,069 kilometers in about three hours．
Of course，there are some technical challenges to overcome．There are so many issues that need to be settled，such as safety，rail gauge（轨距），maintenance of railway tracks．So，it’s important to pay attention to every detail．
But the key issue is really money．China is already spending hundreds of billions of yuan on domestic railway expansion．
China prefers that the other countries pay in natural resources rather than with capital investment．Resources from those countries could stream into China to sustain development．
It’ll be a win-win project．For other countries，the railway network will definitely create more opportunities for business，tourism and so on，not to mention the better communication among those countries．
For China，such a project would not only connect it with the rest of Asia and bring some much-needed resources，but would also help develop China’s far west．We foresee that in the coming decades，millions of people will migrate to the western regions，where the land is empty and resources unused．With high-speed trains，people will set up factories and business centers in the west once and for all．And they’ll trade with Central Asian and Eastern European countries．China’s new high-speed railway plan will be a win-win project because ________．
| A．China will get much-needed resources and develop its western regions |
| B．China and the countries involved will benefit from the project in various ways |
| C．China will develop its railway system and communication with other countries |
| D．the foreign countries involved will develop their railway transportation, business and tourism |
According to the passage，the greatest challenge to the new high-speed railway plan is ________．
| A．technical issues | B．safety of the system |
| C．financial problems | D．maintenance of railway tracks |
Which of the following words best describes the author’s attitude towards China’s high-speed railway plan?
| A．Critical． | B．Reserved． | C．Doubtful． | D．Positive． |
Which of the following might be the best title for the passage?
| A．New Railway Standards. | B．Big Railway Dreams. |
| C．High-speed Bullet Trains. | D．International Railway Network |
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