[外语类试卷]大学英语六级模拟试卷39及答案与解析.doc

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1、大学英语六级模拟试卷 39及答案与解析 一、 Part I Writing (30 minutes) 1 For this part, you are allowed 30 minutes to write a composition on the topic: Idle Young, Needy Old. You should write at least 150 words following the outline given below in Chinese: 1解释谚语 2结合现实举例论证 3珍惜时光，从现在做起 Idle Young, Needy Old 二、 Part II Re

2、ading Comprehension (Skimming and Scanning) (15 minutes) Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions attached to the passage. For questions 1-4, mark： Y (for YES) if the statement agrees with the information given in the passage; N (for

3、NO) if the statement contradicts the information given in the passage; NG (for NOT GIVEN) if the information is not given in the passage. 2 Floods Water is one of the most useful things on Earth. We drink it, bathe in it, clean with it and use it to cook food. Most of the time, it is completely bene

4、ficial to the humans. But in large enough quantities, the very same stuff we use to wash a toothbrush can overturn cars, destroy houses and even kill. Flooding has claimed millions of lives in the last hundred years alone, more than any other weather phenomenon. How water exists on our planet The to

5、tal amount of water on Earth has remained fairly constant for millions of years (though its distribution has varied considerably in that time). Every day, a very small amount of water is lost high in the atmosphere, where intense ultraviolet rays can break a water molecule apart, but new water is al

6、so emitted from the inner part of the Earth, by volcanic activity. The amount of water that is created and the amount that is lost are pretty much equal. At any one time, this volume of water is in many, different forms. It can be liquid, as in oceans, rivers and rain; solid, as in the glaciers of t

7、he North and South Poles; or gaseous, as in the invisible water vapor in the air. Water changes from state to state as it is moved around the planet by wind currents. Wind currents Wind currents are generated by the heating activity of the sun. The sun shines more on the area around Earths equator t

8、han it does on areas farther north and south, causing a heat discrepancy over the surface of the globe. In warmer regions, hot air rises up into the atmosphere, pulling cooler air into the unoccupied space. In cooler regions, cold air sinks, pushing/driving warmer air into the unoccupied space. The

9、rotation of the Earth breaks this cycle up, so there are several, smaller air-current cycles all along the globe. Overall, wind currents in the atmosphere are fairly consistent. At any particular time of year, currents tend to move in a certain way across the globe. Consequently, specific locations

10、generally experience the same sort of weather conditions year to year. But on a day-to-day basis, the weather is not so predictable. Wind currents and precipitation(降水 ) are affected by many factors, chiefly geography and neighboring weather conditions. A huge number of factors combine in an infinit

11、e variety of ways, producing all sorts of weather. Occasionally, these factors interact in such a way that an atypical volume of liquid water collects in one area. For example, conditions occasionally cause the formation of a hurricane, which dumps a large quantity of rain wherever it goes. If a hur

12、ricane lingers over a region, or multiple hurricanes happen to move through the area, the land receives much more precipitation than normal. Waterways Since waterways are formed slowly over time, their size is proportionate to the amount of water that normally accumulates in that area. When there is

13、 suddenly a much greater volume of water, the normal waterways overflow, and the water spreads out over the surrounding land, At its most basic level, this is what a flood isan abnormal accumulation of water in an area of land. Sources of floods As has been mentioned above, floods occur when an atyp

14、ical volume of water collects in an area. There are a number of ways this might happen, and there are a wide range of events that occur when it does. -Rainstorms The sort of flooding that most people are familiar with occurs when an unusually large number of rainstorms hit an area in a fairly short

15、period of time. In this case, the rivers and streams that divert the water to the ocean are simply overwhelmed. The varying temperatures of different seasons lead to different weather patterns. In the winter, for example, the air over the ocean might be warmer than the air over the land, causing the

16、 wind flow to move from the land out to sea. But in the summer, the air over the land heats up, becoming warmer than the air over the ocean. This causes the wind current to reverse, so that more water from the ocean is picked up and carried over land. This monsoon(季风 ) wind system can cause a period

17、 of intense rain that is completely out of step with the climate the rest of the year. In some areas, this flooding may be worsened by excess water from melting snow. Perhaps the best known example of seasonal flooding is the annual expansion of the Nile River in Egypt. In Ancient Egypt, monsoon rai

18、ns at the source of the river would cause the waterway to extend out a good distance during the summer. In this case, the flooding was not a disaster, but a godsend. The expanding waters would leave fertile silt(淤泥 ) all along the banks of the river, making, the area ideal farming land once the rive

19、r had subsided again. This is one of the main factors that allowed civilization to thrive in the Egyptian desert. These days, the river is blocked off by a dam upstream, which collects the summer rain and lets it out throughout the year. This has extended the planting season so that Egyptian farms c

20、an grow crops year-round. -Unusual tidal activity Another common source of flooding is unusual tidal activity that extends the reach of the ocean farther inland than normal. This might be caused by particular wind patterns that push the ocean water in an unusual direction. It can also be caused by t

21、sunamis(海啸 ), large waves in the ocean triggered by a shift in the Earths crust. -Break of man-made dams Floods may also occur when a man-made dam breaks. We build dams to modify the flow of rivers to suit our own purposes. Basically, the dam collects the river water in a large reservoir so that we

22、can decide when to increase or decrease the rivers flow, rather than letting nature decide. Engineers build dams that will stand up to any amount of water that is likely to accumulate. Occasionally, however, more water accumulates than the engineers predicted, and the dam structure breaks under pres

23、sure. When this happens, a massive amount of water is released all at once, causing a violent “wall“ of water to push across the land. In 1889, such a flood occurred in Johnstown, Pennsylvania. The townspeople were warned that the flood was coming, but many dismissed the alert as unfounded panic. Wh

24、en the rushing wall of water did hit, more than 2,000 people were killed in only a few minutes. Severity of a flood The severity of a flood depends not only on the amount of water that accumulates in a period of time, but also on the lands ability to deal with this water. As weve seen, one element o

25、f this is the size of rivers and streams in an area. But an equally important factor is the lands absorbency. When it rains, soil acts as a sort of sponge. When the land is saturatedthat is, has soaked up all the water it canany more water that accumulates must flow as runoff. Some materials become

26、saturated much more quickly than others. To see how this works, just take a bucket of water outside and try wetting various surfaces. Soil in the middle of the forest is an excellent sponge. You could dump several buckets of water on it and it would soak the water right up. Rock is not so absorbenti

27、t doesnt seem to soak up any water at all. Hard clay falls somewhere in between. Generally, soil that has been tilled for crops is less absorbent than uncultivated land, so farm areas may be more likely to experience flooding than natural areas. 2 Flooding is the most destructive weather disaster in

28、 the last hundred years. （ A） Y （ B） N （ C） NG 3 The volcanic activities involve no water in any form because the temperature is so high. （ A） Y （ B） N （ C） NG 4 Wind currents turn out to be more active in colder areas in the northern hemisphere. （ A） Y （ B） N （ C） NG 5 The weather condition for a c

29、ertain place or country will very likely vary every year. （ A） Y （ B） N （ C） NG 6 The preliminary form of flood emerges when water_ in a certain piece of land. 7 In the summer, the wind current will be reversed because the temperature of the air over the land turns higher than _. 8 The ancient Egypt

30、ian civilization thrives in the desert mainly because of the influence of _ from the Nile. 9 A tsunami occurs when there is a shift in_. 10 When a dam breaks, there emerges _ which is caused by the sudden re- lease of a huge amount of water. 11 To judge how serious a flood is, we have to consider th

31、e volumes of rivers and streams in an area and _. Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only

32、 once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer. （ A） She cant help the man out until later. （ B） The task will take more time than the man thinks. （ C） She complains that the man should have

33、 come earlier. （ D） She cant support the mans argument during his debate. （ A） He doesnt know what tools to bring. （ B） He doesnt mind helping the woman. （ C） The woman wont have to carry tools. （ D） The donkeys will carry the womans personal items. （ A） The man and the woman live in different build

34、ings. （ B） The woman is upset that she wasnt invited to the party. （ C） The woman is complaining about the mans carelessness. （ D） The man and his friends might be louder than the woman expected they would be. （ A） He majors in engineering. （ B） He wasnt at the lecture at that time. （ C） He has only

35、 recently become interested in philosophy. （ D） He thinks the woman should also attend Prof. Warners class. （ A） They dont enjoy swimming. （ B） They dont know how to swim. （ C） Theyll swim in. the lake tomorrow. （ D） They wont go swimming in the lake today. （ A） Jack has made others wait before. （ B

36、） Jack has often had to wait for Shelly. （ C） Jack enjoys playing tricks with others. （ D） Jack doesnt usually make people wait. （ A） They should buy a lot of coffee. （ B） Theres room to stack up the cans of coffee. （ C） They should wait for a better deal on coffee. （ D） The store they are talking a

37、bout is out of coffee. （ A） The boss is often late for work. （ B） The boss will probably discipline the woman. （ C） The boss may disregard the womans lateness. （ D） The boss didnt know the woman was late again. （ A） They left their pets with neighbors. （ B） They rented their house to a student. （ C）

38、 They hired someone to stay in their home. （ D） They asked their gardener to watch their house. （ A） They look at a house sitters score report. （ B） They interview a house sitters friends. （ C） They check a house sitters references. （ D） They attend a house sitters party. （ A） The homeowner is afrai

39、d of being accused. （ B） The house sitter pleads again and again. （ C） Most house sitters are very poor. （ D） The homeowner doesnt want to bother. （ A） He cant find his office key. （ B） He has misplaced some exams. （ C） He is unable to speak. （ D） He doesnt like his classroom. （ A） Mark the latest h

40、omework assignment. （ B） Put a cancellation notice on the classroom door. （ C） Make an appointment with the doctor. （ D） Return some exams to his students. （ A） Teach Davids class while he is absent. （ B） Give Professor Winston the key to Davids office. （ C） Leave a message on the board in Davids cl

41、assroom. （ D） Bring David the homework that was due today. （ A） To put the homework on Davids desk. （ B） To leave the master key for David. （ C） To give Davids students the next assignment. （ D） To call David at the end of the afternoon. Section B Directions: In this section, you will hear 3 short p

42、assages. At the end of each passage, you will hear some questions. Both the passage 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. （ A） Workers on the platforms and trains were replaced by machines. （

43、 B） A completely automatic line was added to its network. （ C） It became the first completely automatic railway in the world. （ D） Its trains became manual-controlled. （ A） A platform worker. （ B） A computer. （ C） The command spot. （ D） A machine. （ A） To drive the train after it is started automati

44、cally. （ B） To start the train and to drive it when necessary. （ C） To take care of the passengers on the train. （ D） To send commanding signals to the command spot. （ A） 10 points. （ B） 2 points. （ C） 15 points. （ D） 5 points. （ A） An essay, （ B） A magazine article （ C） A poem. （ D） A short story.

45、（ A） They will take one of the six major tests. （ B） They will be given a pop test. （ C） They will be required to read a short story in class. （ D） They will have to write a composition. （ A） Students from America. （ B） Students from England. （ C） Students from Australia. （ D） Students from Japan. （

46、 A） Those who know how to program computers. （ B） Those who get special aid from their teachers. （ C） Those who are very hardworking. （ D） Those who have well-educated parents. （ A） Japanese students study much harder than Columbian students. （ B） Columbian students score higher than Japanese studen

47、ts in math. （ C） Columbian students are more optimistic about their math skills. （ D） Japanese students have better conditions for study. （ A） Physics. （ B） Mathematics. （ C） Environmental science. （ D） Life science. Section C Directions: In this section, you will hear a passage three times. When th

48、e passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in

49、the missing information. For these blanks, you can either use the exact words you have just heard or write down the 37 There are two basic ways to see growth: One as a product, the other as a process. People have (36)_ viewed personal growth as an external result or product that can easily be identified and measured. By contrast, the process of personal growth is much more difficult to determine, since by (37)_ it is a journey and not the specific signposts or l