It is estimated that Shanghai will catch up with the international cities like New York in twenty years．

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Not until most of the people had left the meeting room______his sister was there.

The report showed us very (clear) ______how the plane crashed.

Owning a mobile phone definitely makes life more convenient，but you’d better limit your conversations to urgent ones and save the personal calls until you are at home．

This time next week I'll be on vacation. Probably I______ on a beautiful beach.

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People travel a lot with Heaven Air because they know they well get what they want. They want to go quickly and safely across the land, across the sea or right across the world, and they know Heaven Air will take them where they want to go whenever they want to go. Heaven. Air flies all the newest and fastest planes to more towns and cities of the world than any other airlines. Do you want to go to Paris, Washington, Tokyo? Heaven Air will take you there, at all times of the day or night, right through the week. But Heaven Air flies not only to the biggest cities, we also fly two or three times a week to towns and cities in the very center of Asia, Africa and South America. People fly with Heaven Air because they know they will leave on time and arrive on time, They know that they will receive the best food and watch the best films. Heaven Air is second to none.

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What is not necessary for other's help? Excessive______.

When you open your electronic mail, you may find information about how to buy medicine, cheap airline tickets, books, computer products, and so on. There may also be offers for investment deals, bank loans and special holidays. However, to many computer users, this use of electronic spam to sell products has become a major problem as it makes computer communication more difficult. Many companies that want to send a great deal of advertising at the same time might use the services of a "spammer". A spammer is a person or company that uses computers to send out millions of copies of the same sales information. Spammers get people's e-mail addresses from websites, news groups and "chat rooms" where people send messages to each other. Most spam is sent by companies that are trying to get you to buy their products. Some of these are honest companies that may offer good products or services for fair prices. These companies can offer their products for a cheaper price than you might find in a store. However, much of the spam on the Internet is sent by criminals(罪犯) who are trying to sell products that do not exist or offer services they will not provide at all. What they are only interested in is stealing your money. When you answer their spam you find you are expected to send them money and receive a gift. If you just follow what they ask you to do without any consideration, it is likely that you will be cheated and lose some money.

_____(直到傍晚的时候)that he began to tackle the major problem.

The teacher warned that anyone who was caught(cheat) ______during the test would be punished.

On weekends there are a lot of children playing in the park, ______parents seated together joking.

Everyone has periods in their lives______everything seems so hard.

So absorbed as he is mat she did not dare to make a sound．

By the end of last month, our factory(produce)______3 000 motors.

I will tell Mary the truth instead of you, but I'd rather you (tell)______her.

阅读理解Historians and philosophers agree that ever since the development of agriculture, human beings have had an effect on the natural habitat (动、植物生息地) of many plants and animal species. As human populations have increased, as many as 6,000 species are disappearing each year. A number 10,000 times greater than before man appeared on the planet. In one day alone, say scientists, some 45 kinds of plants and animals will die, some 17,500 species will be wiped out. In 1977, the United States Congress took an important step to help the ever-increasing number of endangered species. With the enforcement of the Endangered Species Act, some species have gained more public recognition than others. Elephants and whales, for example, have received far more media attention than have the smaller, less known, and less attractive species that are also endangered. Yet it is the tiny species, such as bugs and bacteria, that keep the planet in balance. Scientists are becoming even more concerned with the fact that without equal concern for these species, the planet''s biological diversity will be destroyed, leaving us with a loss of potential new food and drugs. On the other hand, some scientists argue that the extinction issue is being exaggerated(夸大) , and that people are "crying wolf" by describing the loss of species as more alarming than it really is. History proves that every species will eventually become extinct. Evolution of species, they say, naturally involves the extinction of species；man has no control. In addition, many people point to the fact that the world is already lacking in resources, food, and adequate health care. Concerned more with economic survival, they ask whether it is, in fact, realistic to make a fuss over saving the elephant or other species that may become extinct many years from now, when people have families to feed tomorrow. These people question a law that puts the continuation of lower forms of life above man s own survival. QUESTIONS： 1. The issue: To what extent we should try to (46) ___________or allow for man''s development. 2. Proponents'' (支持者) ( of saving endangered species) arguments: a. The extinction of plants and animals is (47) ___________before man appeared on the planet. b. Tiny species keep the earth in balance. c. Man needs (48) ___________for food and drugs. 3. Opponents'' (反对者) ( of saving endangered species) arguments: a. Proponents exaggerate the case. b. Species (49) ___________. c. Man''s need (50) ________.