单选题Preserve the Environment Throughout history man has changed his physical environment in order to improve his way of life. With the tools of technology he has altered many physical features of the earth. He has transformed woodlands into farmland, and made lakes and reservoirs out of rivers for irrigation purposes or hydroelectric power. Man has also modified the face of the earth by draining marshes and cutting through mountains to build roads and railways. However, man"s changes to the physical environment have not always had beneficial results. Today, pollution of the air and water is an increasing danger to the health of the planet. Each day thousands of tons of gases come out of the exhausts of motor vehicles; smoke from factories pollutes the air of industrialized areas and the surrounding areas of countryside. The air in cities is becoming increasingly unhealthy. The pollution of water is equally harmful. In the sea, pollution from oil is increasing and is killing enormous numbers of algae(水藻), fish and birds. The whole ecological balance of the sea is being changed. The same problem exists in rivers. Industrial wastes have already made many rivers lifeless. Conservationists believe that it is now necessary for man to limit the growth of technology in order to survive on earth.

单选题We can {{U}}utilize{{/U}} water for producing electric power.

单选题Don't {{U}}irritate{{/U}} her—she's on a short fuse today. A.tease B.attract C.annoy D.protect

单选题Mary is looking for the book she lost yesterday A. trying to find B. trying to read C. trying to buy D. trying to borrow

单选题Every experience teaches the people something and the effects are {{U}}cumulative{{/U}}.

单选题The substance can be added to gasoline to Uaccelerate/U the speed of automobiles.

单选题Fourth, people say they're tired. "I'm too tired to exercise. I'll exercise when I have more energy. "But exercise gives you energy. Most people feel too tired because they don't exercise. The solution? Exercise every day. Take a walk. Go for a bike ride. Run around the block. You'll feel great! And you won't feel tired. According to the paragraph, exercising every day is a good wayA. to equip oneself with energy.B. to keep fit.C. to remove anxiety.D. to make one feel relaxe

单选题The once barren hillsides are now good farmland.

单选题The word“sustain”(paragraph 2)could be best replaced by

单选题{{B}}第二篇{{/B}} {{B}}Saving Money{{/B}} Where you save your money often depends on what you are saving for. If you are saving to buy a CD (光盘) or to go to a concert, then probably you would keep your money somewhere in your room. If you are saving for a big purchase like a mountain bike or a school trip, where would you save your money? One place to save money is the bank. Putting your money in a savings account will help your money earn more money. If you put your money in a piggy bank (猪形储蓄罐), one year later you'll still have the same amount of money you put in. If you put your money in a savings account, one year later, you'll have more money than you put in. Why? When you keep your money in a bank, your money earns interest. Interest is an amount of money a bank pays you to use your money. The bank uses your money (and the money of other people, too) to loan money to people and businesses. The bank will send you a statement several times a year. A bank statement tells you how much money you have in your account. It also tells you how much interest you have earned. If you leave your money in the bank, you can watch it grow! Another way you can save money is to buy a certificate of deposit or CD. If you have some money that you don't need to use for a long time, this is a good way to make your money grow. You can buy a CD at a bank. You agree not to use the money for a certain period of time. That period might be from six months to five years. You can't touch your money during that time. If you do, you must pay a penalty, or fee.

单选题I wrapped the book in brown paper before I mailed it.

单选题The （frame） needs to be strong enough to support the engine.

单选题Advertisement Advertisement can be thought of "as the means of making known in order to buy or sell goods or services ". Advertisement aims to increase people"s awareness and arouse interest. It tries to inform and to persuade. The media are all used to spread the message. The press offers a fairly cheap method, and magazines are used to reach special sections of the market. The cinema and commercial radio are useful for local market. Television, although more expensive, can be very effective. Public notices are fairly cheap and more permanent in their power of attraction. Other ways of increasing consumer interest are through exhibitions and trade fairs as well as direct mail advertisement. There can be no doubt that the growth in advertisement is one of the most striking features of the western world in this century. Many businesses such as those handling frozen foods, liquor, tobacco and medicines have been built up largely by advertisement. We might ask whether the cost of advertisement is paid for by the producer or by the customer. Since advertisement forms part of the cost of production, which has to be covered by the selling price, it is clear that it is the customer who pays for advertisement. However, if large scale advertisement leads to increased demand, production costs are reduced, and the customer pays less. It is difficult to measure exactly the influence of advertisement on sales. When the market is growing, advertisement helps to increase demand. When the market is shrinking, advertisement may prevent a bigger fall in sales than would occur without its support. What is clear is that businesses would not pay large sums for advertisement if they were not convinced of its value to them.

单选题Major product categories {{U}}encompass{{/U}} electronic test and measuring instruments, solid-state components, electronic calculations.

单选题Nursing services in a hospital are generally available around the clock.

单选题Margaret Avison, one of Canada's finest poets, has remained outside the mainstream of recognized writers.

单选题First and foremost, we must work out how we are going to get there.A. thinkB. planC. writeD. check

单选题The boy is Uintelligent/U.

单选题The problem was finally solved with our great efforts.A. clearlyB. apparentlyC. eventuallyD. naturally

单选题You look smart in the new suit. A. clever B. handsome C. loyal D. brave