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Tidal action is a very complicated phenomenon involving many factors all of which must be considered to predict tide in any one place and at any one time. The alternate rise and fall of the surface of the seas and the ocean is mainly caused by the attractive force of the moon alone. When the attraction is great, the tide is high; and conversely when the attraction is minimal, the tide is low. Between the high tide and the low tide is a period of a little over six hours, being called during its rise a flood tide, and during its fall an ebb tide.The sun also exerts its effect on the tide, being a little less than half as much as the moon, although it’s mass is so much greater. When the moon and the sun are horizontal, the highest high tide occurs and when they are vertical the lowest low tide takes place.The wind also plays an important part in the modification of the normal rise and fall of the tide. Thus these factors affect each other, either distracting or adding to the attractive forces to add or subtract from the height of the tide. But the tides still move inexorably on, rising twice a day, getting little later each day and posing a problem of correctly predicting their heights and lows.46. The principal ideas of the article concerns( ).47. Which of the following factors is NOT mentioned as affecting the tide?48. It can be concluded from the article that the attraction of the sun is( ).49. If the first high tide takes place at 1:00 a. m. the next high tide will probably take place at( ).50. According to the article, it is clear that the role of the moon( ).

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One of the qualities that most people admire in others is the willingness to admit one’s mistakes. It is extremely hard to sometimes to say a simple thing like “I was wrong about that,” and it is even harder to say “I was wrong, and you were right about that.”I had an experience recently with someone admitting to me that he had made a mistake fifteen years ago. He told me he had been the manager of a certain grocery store in the neighborhood where I grew up, and he asked me if I remembered the egg cartons. Then he related an incident and I began to remember vaguely the incident he was describing.I was about eight years old at the time, and I had gone into the store with my mother to do the weekly grocery shopping. On that particular day, I must have found my way to the dairy food department where the incident took place.There must have been a special sale on eggs that day because there was an impressive display of eggs in dozen and half-dozen cartons. The cartons were stacked three or four feet high. I must have stopped in front of a display to admire the stacks. Just then a woman came by pushing her grocery cart and knocked off the stacks of cartons. For some reasons, I decided it was up to me to put the display back together, so I went to work.The manager heard the noise, and came rushing over to see what had happened. When he appeared, I was on my knees inspecting some of the cartons to see if any of the eggs were broken, but to him it looked as though I was the culprit (罪人). He severely reprimanded me and wanted me to pay for any broken eggs. I protested my innocence and tried to explain, but it did no good. Even though I quickly forgot all about the incident, apparently the manager did not.41. How old was the author when he wrote this article?42. Who was to blame for knocking off the stacks of cartons?43. Which of the following statements is NOT TRUE?44. Which of the following can serve as the best title of the passage?45. The tone of the article expresses the author’s( ).

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As protector of her family’s health, the pioneer woman confronted situations she never imagined before crossing the Mississippi. Few women came west prepared to deal with desert sunburn, rattlesnake bites, or arrow wounds. Even when doctors were available, they were often no more knowledgeable than their patients. And most patent medicines were no more reliable than the itinerant merchants who sold them.In certain cases, a woman could draw upon the folk wisdom and remedies she had learned back home; Western mosquitoes, for example, proved to be as repelled by a paste of vinegar and salt as were their Eastern cousins. More often, however, a woman was guided only by her own ingenuity in concocting tonics, powders, poisons, and polishes from whatever she had at hand; salt made a passable toothpaste; gunpowder was applied to warts, and turpentine(松节油) to open cuts; goose grease, skunk oil, and the ever-present lard were basic liniments; medical teas and tonics were brewed from sunflower seeds and roots.31. According to the passage, why were doctors in the west sometimes unable to help their patients?32. Which of the following can be inferred from the passage about patent medicines?33. It can be inferred that most of the pioneers referred to in the passage were originally from where in the United States?34. All of the following were mentioned in the passage as being encountered by the pioneers EXCEPT( ).35. It can be inferred from the passage that in order to survive in the West, the pioneers had to be( ).

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Directions: This part consists of ten sentences. Each sentence has four parts underlined and labeled A, B, C and D. Identify the one choice that is not accepted in standard English and mark your choice by blackening the corresponding letter on the Answer Sheet.21. A few [A] naturally elements exist in such small [B] amounts that they are known [C] mainly from laboratory-made [D] samples.22. [A] To stay warm in cold weather, cold-blooded animals must expose [B] itself to [C] a source of warmth such as [D] direct sunlight.23. A severe illness [A] where she was [B] just nineteen months old [C] deprived Helen Keller [D] of both her sight and hearing.24. In [A] the wild, tea plants become [B] trees of [C] approximately thirty feet in [D]high.25. For many centuries, sailors [A] relied on echoes [B] to warn them of [C]another ships, icebergs, or cliffs in [D] foggy weather.26. [A] It is the [B] interaction between people, rather than the events that occur in their lives, [C] that are the main focus of [D] social psychology.27. It is true that [A] the rotation of the Earth [B] on its axis is responsible [C] with the alternation of periods [D] of light and darkness.28. One of the most difficult [A] questions [B] in defining sleep [C] is “What [D] is the functions of sleep?”29. Seven [A] of planets rotate in the same direction [B] as their orbital motions, [C] while Venus and Uranus rotate in the [D] opposite direction.30. The tongue is [A] capable of many [B] motions and configurations and plays [C] a vital role in chewing, [D] swallowed, and speaking.

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