Many people believe the glare（炫目的光）from snow causes snowblindness. Yet, with dark glasses or not, they find themselves suffering from headaches and watering eyes, and even snowblindness ,when exposed to several hours of“ snow light”.

　　The United States army has now determined that glare from snow does not cause snowblindness in troops in a snow -covered country. Rather ,a man’s eyes frequently find nothing to focus on （聚集） in a broad space of snow- covered without- grass land. So his gaze continually moves and jumps back and forth over the entire landscape in search of something to look at. Finding something, hour after hour, the eyes never stop searching and the eyeballs become tired and the eye muscles ache. Nature makes up for this discomfort by producing more and more fluid （流 体） which covers the eyeball. The fluid covers the eyeball in increasing quantity until it makes eyes difficult to see dearly, and the result is total, even though for a short time, snowblindness.

　　Experiments led the Army to a simple method of overcoming this problem. Scouts（侦察兵）ahead of the troops are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow - covered landscape. Even the scouts themselves throw lightweight, dark - colored objects ahead on which they can focus too. The men following can then see something. Their gaze is arrested. Their eyes focus on a bush and having found something to see, stop searching the snow -blanketed landscape. By focusing their attention on one object at a time. the men can cross the snow without becoming hopelessly snowblind or lost. In this way the problem of crossing a continuous white land is overcome.

To prevent snowblindness caused by the strong light from snow, wearing glasses or not ________.

　　A. depends on whether the snow is white enough

　　B. makes no difference

　　C. makes much difference

　　D. depends on whether the snow is thick

When the eyes are tired, tears flow out ________.

　　A. to clear the vision

　　B. to make the eyes stop searching

　　C. to make the vision unclear

　　D. to produce more and more liquid

Snowblindness can be avoided ________.

　　A. by moving one’s gaze back and forth

　　B. by walking ahead and keeping looking around

　　C. by making up for the discomfort of one’s eyes

　　D. by providing the eyes with something to focus on

Basic Math introduces students to the basic things of mathematics, as well as some easy methods of learning it. These 30 fantastic courses are designed to provide students with understanding of arithmetic and to prepare them for Algebra (代数) and beyond.

　　The lessons in Basic Math cover every basic field of arithmetic. They also look into exponents (指数), the order of operations, and square roots. In addition to that, students also discover how a particular mathematical topic relates to other branches , and how they can be used practically.

　　Basic Math starts from easier concepts and gradually moves on to the more troublesome ones.  The lectures offer students the chance to understand of mathematical knowledge that may have seemed so frightening. They also help students prepare for college mathematics and develop confidence in this amazing field of study.

　　With the help of these lectures, they will be able to clear away the mystery (神秘性) of mathematics and face their studies with more confidence than they ever imagined. Besides, they will strengthen their ability to accept new and exciting mathematical challenges.

　　Professor H. Siegel, honored by Kentucky Educational Television as "the best math teacher in America, " is a devoted teacher and has a gift for explaining mathematical concepts in clear and interesting ways. From the basic ideas to the more difficult problems, he is a master in making math lectures learner-friendlier and less frightening

　　With a PhD in Mathematics Education form Georgia State University, Dr. Siegel now teaches mathematics at Central Arizona College.

　　If the course fails to provide complete satisfaction to you, you can easily exchange it for any other course that we offer. Or you can get your money back.

1.What does the course Basic Math mainly cover?

2. What good things can students expect from Basic Math?

3.What can we learn about Professor H. Siegel?

4.Where is the passage most likely to have been taken from?　　

 There was once a farmer who lived near a road. It was not a busy road,but from time to time,cars passed the farm.

　　Near the farm gate, there was a large hole in the road. this hole was always full of water, and the drivers of the cars could not see how deep the hole was. They thought it was probably not deep.So when they drove into the hole, they could not drive out because it was so deep.

　　The farmer did not spend much time working on his farm. He spent most time watching the hole. Whenever a car drove into it, he would pull the car out with his tractor and he would charge the drivers for much more money than they had expected.

　　One day, a driver of a car said to him, "You must have made a lot of money pulling cars out of this hole night and day."

　　"Oh no," the farmer said, "I don’t pull cars out of the hole at night. At night I fill the hole with water."

1.Many cars went into the hole because the drivers_____.

2.The drivers were _____ to pay the farmer for pulling their cars out of the hole.

3.Why did the farmer fill the hole with water at night?

4.What did the writer think of the farmer?

第三部分：完形填空（共20小题；每小题1.5分，满分30分）

Two men, both seriously ill, occupied the same hospital room. One man was allowed to sit up in his bed for an hour each   16   to help drain the fluid(排出流质) from his lungs. His bed was next to the room’s only window. The other man had to spend all his time  17   on his back.

The men talked for hours on end. They spoke of their families, their homes, their jobs and a whole lot of things. Every afternoon when the man in the bed by the window could sit up, he would pass the time by  18   to his roommate what he could see   19   the window.

The man in the other bed began to   20   for those one-hour periods when his   21   would be broadened and brightened by all the activity and color of the world outside.

The window overlooked a   22   with a lovely lake. Ducks and swans played on the water while children   23   their model boats. Young lovers walked arm in arm among   24   of every color and a fine   25   of the city skyline could be seen in the   26  . As the man described all this, the man on the other side of the room would close his eyes and  27   the beautiful scene.

Days and weeks passed. One morning, the day nurse arrived to find the man by the window, had died   28  in his sleep. Later, the other man asked   29   he could be moved next to the window. The nurse was happy to make the switch.

Slowly, painfully, he managed to   30   and take his first look at the   31   world outside. Surprisingly, it   32   a blank wall.  　　

The next day he learned from the nurse that the man was   33   and could not   34   see the wall. She said, “Perhaps he just wanted to   35   you.”

16. A. morning                   B. afternoon              C. evening                  D. night

17. A. flat                                B. quiet                       C. still                     D. calm

18. A. listening                   B. talking              C. describing        D. explaining

19. A. beyond                B. outside                  C. behind              D. near

20. A. look                           B. live                          C. prepare                 D. work

21. A. health                 B. dream                    C. world                D. career

22. A. garden                B. farm                       C. mountain          D. park

23. A. made                   B. rowed                    C. took                    D. sailed

24. A. trees                         B. flowers                  C. houses                       D. birds

25. A. photo                  B. map                        C. view                   D. appearance

26. A. distance                       B. hospital                 C. future               D. sky

27. A. enjoy                   B. experience      C. sense                 D. imagine

28. A. peacefully        B. painfully                 C. sadly                  D. bravely

29. A. when                   B. if                         C. how                    D. why

30. A. climb up                   B. stand up                C. sit up                  D. turn up

31. A. real                           B. noisy                       C. ordinary                 D. new

32. A. contained                B. covered                 C. connected        D. faced

33. A. mad                          B. blind                       C. ill                    D. dead

34. A. yet                       B. just                         C. even                   D. clearly

35. A. support               B. fool                         C. cure                    D. encourage

Most British telephone cards are just plain green, but card collecting is becoming a popular hobby in Britain and collectors even have their own magazine, International Telephone Cards. One reason for their interest is that cards from around the world come in a wide variety of different and often very attractive designs. There are 100, 000 different cards in Japan alone, and there you can put your own design onto a blank card simply by using a photograph or a business card.

　　The first telephone cards, produced in 1976, were Italian. Five years later the first British card appeared, and now you can buy cards in more than a hundred countries. People usually start collecting cards because they are attractive, small and light , and they do not need much space. It is also a cheap hobby for beginners, although for some people it becomes a serious business. In Paris, for example, there is a market where you can buy only telephone cards, and some French cards cost up to 4, 000 pounds. The first Japanese card has a value of about 28, 000 pounds. Most people only see cards with prices like these in their collectors magazine.

1.The text is mainly about ________ .

2.When did people in Britain begin to use phone cards?

3.The main reason for most people to collect phone cards is that ________ .

4.The writer mentions a market in Paris in order to show that ________