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请阅读Passage 1，完成第21～25小题。
Passage 1
Polyester (聚酯) is now being used for bottles. ICI, the chemicals and plastics company,believes that it is now beginning to break the grip of glass on the bottle business and thus take advantage of this huge market.
All the plastics manufacturers have been experiencing hard times as their traditional products have been doing badly world-wide for the last few years. Between 1982 and 1984 the Plastics Division of ICI had lost a hundred and twenty million dollars, and they felt that the most hopeful new market was in packaging, bottles and cans.
Since 1982 it has opened three new factories producing "Melinar", the raw material frown which high quality polyester bottles are made.
The polyester bottle was born in the 1970s, when soft drinks companies like Coca Cola started selling their drinks in giant two-liter containers. Because of the build-up of the pressure of gas in these large containers, glass was unsuitable. Nor was PVC, the plastic which had been used for bottles since the 1960s, suitable for drinks with gas in them. A new plastic had to be made.
Glass is still cheaper for the smaller bottles and will continue to be so, unless oil and plastic become much cheaper, but plastic does well for the larger sizes.
Polyester bottles are virtually unbreakable. The manufacturers claim they are also lighter, less noisy when being handled, and can be reused. Shopkeepers and other business people are unlikely to object to a change from glass to polyester, since these bottles mean few breakages, which are costly and time-consuming. The public, though, have been more difficult to persuade. ICI's commercial department is developing different bottles with interesting shapes, to try and make
them visually more attractive to the public.
The next step could be to develop a plastic which could replace tins for food. The problem here is the high temperatures necessary for cooking the food in the container.
21. Why is ICI's Plastics Division interested in polyester for bottles?
A. The other things they make are not selling well.
B. Glass manufacturers cannot make enough new bottles.
C. They have factories which could be adapted to make it.
D. The price of oil keeps changing.
22. Plastics of various kinds have been used for making bottles__________.
A. since 1982
B. since the 1970s but only for large bottles
C. since the 1960s but not for liquids with gas in them
D. since companies like Coca Cola first tried them
23. Manufacturers think polyester bottles are better than glass bottles because they__________.
A. are cheaper
B. are more suited to small sizes
C, are more exciting to look at
D. do not break easily
24. Why aren't all bottles now made of polyester?
A. The price of oil and plastic has risen.
B. It is not suitable for containing gassy drinks.
C. The public like traditional glass bottles.
D. Shop-keepers dislike reusable bottles.
25. Plastic containers for holding food in the same way as cans__________.
A. have been used for many years
B. are an idea that interests the plastics companies
C. are possible, but only for hot food
D. are the first things being made in the new factories
请阅读Passage 2，完成第26～30小题。
Passage 2
Anne Whitney, a sophomore at Colorado State University, first had a problem taking tests when she began college."I was always well prepared for my tests. Sometimes I studied for weeks before a test. Yet I would go in to take the test, only to find I could not answer the questions correctly. I would blank out because of nervousness and fear. I couldn't think of the answer. My low grades on the tests did not show what I knew to the teacher." Another student in biology had similar experiences. He said, "My first chemistry test was very difficult. Then, on the second test,
I sat down to take it, and I was so nervous that I was shaking. My hands were moving up and down so quickly that it was hard to hold my pencil. I knew the material and I knew the answers. Yet I couldn't even write them down! "
These two young students were experiencing something called test anxiety. Because a student worries and is uneasy about a test, his or her mind does not work as well as it usually does. The student cannot write or think clearly because of the extreme tension and nervousness. Although poor grades are often a result of poor study habits, sometimes test anxiety causes the low grades.
Recently, test anxiety has been recognized as a real problem, not just an excuse or a false explanation of lazy students.
Special university advising courses try to help students. In these courses, advisors try to help students by teaching them how to manage test anxiety. At some universities, students take tests to measure their anxiety. If the tests show their anxiety is high, the students can take short courses to help them deal with their tensions. These courses teach students how to relax their bodies. Students are trained to become calm in very tense situations. By controlling their nervousness, they can let their minds work at ease. Learned information then comes out without difficulty on a test.
An expert at the University of California explains: "With almost all students, relaxation and less stress are felt after taking our program. Most of them experience better control during their tests. Almost all have some improvement. With some, the improvement is very great."
26. To "blank out" is probably__________.
A. to be like a blanket
B. to be sure of an answer
C. to be unable to think clearly
D. to show knowledge to the teacher
27. Poor grades are usually the result of__________.
A. poor sleeping habit
B. laziness
C. lack of sleep
D. inability to form good study habits
28. Test anxiety has been recognized as__________.
A. an excuse for laziness
B. the result of poor study habits
C. a real problem
D. something that cannot be changed
29. To deal with this problem, students say they want to__________.
A. take a short course on anxiety
B. read about anxiety
C. be able to manage or understand their anxiety
D. take tests to prove they are not anxious
30. A University of California advisor said__________.
A. all students could overcome the anxiety after taking a special test anxiety program
B. almost all students felt less stress after taking a University of California advising course
C. students found it difficult to improve even though they had taken a special test anxiety course
D. students found it easy to relax as soon as they entered a University of California advising course
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