Part IV Translation

Yet these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. (Passage Two)

翻译：

As the source of aluminum is almost inexhaustible, we can expect that more and more uses will be found for this versatile metal. (Passage Two)

Directions:

In thissection,you will hear two long conversations.At the end of each conversation, you will hear some questions. Both the conversation and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D. Then mark the corresponding letter on the Answer Sheet with a single line through the centre.

Questions 1 to 4 are based on the conversation you have just heard.

1、 A. The collection of precious metals.

B. A standard measuring weight unit.

C. The value of precious metals.

D. A new metric system of measurement.

2、 A. Checking the accuracy of scales.

B. Calculating the density ofmetals.

C.Observing humidity of atmosphere.

D.Measuring amounts of rainfall.

3、 A. It has been rusty. B. It was not scientific.

C. It was of low quality. D. It was out of date.

4、 A. It is very cheap. B. It is difficult to say.

C. It is too expensive. D. It is reasonable.

Questions 5 to 8 are based on the conversation you have just heard.

5、 A. She is busy writing a biological article.

B. She is busy with a program about endangered species.

C. She is busy reading some books on economics.

D. She is busy with two research papers.

6、 A. Some species are impossible to conserve.

B. People are less conscious of saving endangered species.

C. Funds are difficult to get to conserve endangered species.

D. It is difficult to determine which animals are endangered.

7、 A. The relatives of the tailed toad have been extinct.

B. The varieties of the tailed toad are helpful to the research ofevolution.

C.If the tailed toad is well conserved,many other species will be better saved.

D.If the tailed toad was extinct,some myth about evolution would lose.

8、 A. The man is busy preparing the research paper.

B. The woman should hand two papers in on the same day.

C. The man is reading a hook only about biology.

D. The woman is glad to make a decision on which animal to save.

Passage 2

Questions 6 to 10 are based on the following passage:

When aluminum was first produced about a hundred and fifty years ago, it was so difficult to separate form the ores in which it was found that its price was higher than that of gold. The price remained high until a new process was discovered for refining the metal with the aid of electricity approximately three quarters of a century later. The new method was so much cheaper that aluminum because practical for many purposes, one of which was making pots and pans.

Aluminum is lightweight, rustproof and easily shaped into different forms. By mixing it with other metals, scientists have been able to produce a variety of alloys, some of which have the strength of steel but weigh only one third as much.

Today, the uses of aluminum are innumerable. Perhaps its most important use is in transportation. Aluminum is found in the engine of automobiles, in the hulls of boats. It is also used in many parts of airplanes. In fact, the huge “airbus” planes would probably never have been produced if aluminum did not exist. By making vehicles lighter in weight aluminum has greatly reduced the amount of fuel needed to move them, Aluminum is also being used extensively in the building industry in some countries.

Since aluminum is such a versatile (多用的) metal, it is fortunate that bauxite (铝土矿), which is one of its chief sources, is also one of the earth’s most plentiful substances. As the source of aluminum is almost inexhaustible, we can expect that more and more uses will be found for this versatile metal.

6. The price of aluminum was sharply reduced when people discovered a new refining process with the aid of .

A. wind B. solar energy C. hydraulic power D. electricity

7. Aluminum is .

A. lightweight, rustproof but not easily shaped into different forms

B. heavyweight, rustproof and easily shaped into different forms

C. lightweight, rustproof and easily shaped into different forms

D. lightweight and easily shaped into different forms but it is easy to become rusty

8. Which of the following is NOT true?

A. Aluminum is widely used in transportation.

B. Aluminum is also used in many parts of airplanes.

C. Aluminum is being used extensively in the building industry.

D. Aluminum is not used in its pure form.

9. Aluminum is found on earth mostly in the form of .

A. pure metal B. bauxite C. gold D. liquid

10. What is the passage talking about?

A. The features of aluminum and its functions. B. The process of aluminum.

C. The discovery of aluminum. D. The promising future of aluminum.

Hetoldthestoryinsuchminutedetail________________(简直就像他亲眼看见一样).