1、大学英语四级分类模拟题 509及答案解析(总分：202.50，做题时间：90 分钟)一、Part Writing(总题数：1，分数：106.50)1.Directions: For this part, you are allowed 30 minutes to write an essay commenting on one of the most popular sentences online, “REMEMBER. always act like you“re wearing an invisible crown.“ You can cite examples to illustrat
2、e your point. You should write at least 120 words but no more than 180 words. （分数：106.50）_二、Part Reading Compr(总题数：0，分数：0.00)四、Passage One(总题数：1，分数：5.00)For thousands of years, people thought of glass as something beautiful to look at. Only recently have they come to think of it as something to look
3、 through. Stores display their goods in large glass windows. Glass bottles and jars that hold food and drink allow us to see the contents. Glass is used to make eyeglasses, microscopes, telescopes, and many other extremely useful and necessary objects. Until the Second World War, most of the glass u
4、sed for optical instruments was imported from Europe. However, during the war Americans could not get European glass, and they were forced to make their own. As a result, new kinds of glasses were developed that had been previously unknown. These new effects were achieved by mixing other chemical el
5、ements with the sand. Some of these new glasses are very strong and can resist many kinds of shocks. Legend has it that a very hard glass was invented by a Roman who showed his discovery to the Emperor. When the Emperor saw the glass he feared that it would become more valuable than gold and silver,
6、 malting his treasure worthless. Therefore, he had the glassmaker killed, and the secret was not discovered again for hundreds of years. In the present century, safety glass was invented for use in modern cars and planes. Safety glass is made by placing a layer of plastic between two layers of plate
7、 glass. When the outside layer of glass is broken, the pieces do not scatter and injure people. Some glass of this type is strong enough to resist bullets. Although in recent years plastics have replaced glass under conditions where glass might be easily broken, there are new uses being developed, f
8、or the greatest advantage of glass is that its component parts are inexpensive and can be found all over the world.（分数：5.00）(1).With the passage of time, glass _.（分数：1.00）A.is regarded as transparentB.is no longer seen as decorationC.is used to make things look pleasantD.is widely used to replace st
9、eel in making containers(2).Why did Americans make their own glass during the Second World War?（分数：1.00）A.The war blocked the way of glass import.B.They refused to use the European glass.C.The glass made in Europe was out of date.D.They were able to make a new kind of glass.(3).By telling the legend
10、, the author wants to _.（分数：1.00）A.prove that the Roman was the first inventor of hard glassB.support that the Americans were as clever as the RomansC.give some interesting information about hard glassD.provide a historical event concerned with hard glass(4).All of the following concerning the safet
11、y glass are discussed in the text EXCEPT _.（分数：1.00）A.its usesB.its strengthC.its structureD.its limitations(5).New uses of glass are being developed on the ground that _.（分数：1.00）A.glass is not as safe as plasticsB.glass is not as strong and durable as plasticsC.glass is easily obtainable and inexp
12、ensiveD.glass is more and more widely used五、Passage Two(总题数：1，分数：71.00)The word “unfriending“ entered common vocabulary only a few years ago, and since then researchers have been trying to understand why and when it happens. The answers relate to a bigger outstanding question in web science: Are onl
13、ine social relationships fundamentally different to physical world ties? The likes of Facebook also want to know what drives unfriending, because decaying friendships is bad for business. Up until now, the evidence suggested that unfriending on online social networks was driven mainly by too-frequen
14、t posts about polarising (两极化的) topics. Too much religion? Goodbye. Support gay marriage? Unfriend. And in a recent survey of US adults, 55 percent said they unfriended people because of their offensive status updates or comments. That was the most popular reason, followed by “not knowing the person
15、 well“ (41 percent), and “tried to sell me something“ (39 percent). So far, so unsurprising. Yet Daniele Quercia at the University of Cambridge had doubts about whether politics and rudeness really were the most common reasons for severing Facebook ties. After all, he says, these recent studies and
16、surveys were based on self-reported behaviour, not hard data. And more importantly, the reasons people gave for severing their Facebook ties are not the same factors that lead to the dissolution of offline relationships. So Quercia and his colleagues analysed the dynamics of more than 34,000 Faceboo
17、k relationships to find patterns that correlated with unfriending. He presented the results at the Web Science conference in Evanston, Illinois, last month. Sure enough, a lack of similarity, especially between ages, and few mutual friendships were the dominant factors correlating with unfriending a
18、ll of which mirrors the decline of physical-world relationships. Quercia also found that having a mutual female friend makes unfriending less likely than sharing a male friend. Finally, Quercia also showed that personality type matters. Perhaps not surprisingly, a relationship is more likely to brea
19、k if one of the people is introverted (内向的). Facebook may be a new environment, but the age-old rules of friendship apply there too.（分数：71.00）(1).Why does Facebook want to know the reason for unfriending?（分数：14.20）A.It is hard to make new friends online.B.It has interest in online relationship.C.Its
20、 user may lose trust on their friends.D.Unfriending may do harm to its business.(2).What can we learn about unfriending from the recent survey of US adults?（分数：14.20）A.A person is most likely to be unfriended if he makes offensive comments.B.Unfriending happens only when people have different religi
21、ous beliefs.C.No one would make friend online with those who try to sell them something.D.People online would like to talk with someone they are not very familiar with.(3).What would Daniele Quercia agree with?（分数：14.20）A.Politics is the most popular reasons for unfriending.B.Rudeness is the main re
22、ason for the fraction of offline relationships.C.Studies that are based on self-reported behavior are not reliable enough.D.People in the surveys did not tell the truth about their reasons for unfriending.(4).The dominant factors leading to unfriending online _.（分数：14.20）A.also explain the decline o
23、f real-world relationshipsB.hint that there is no fixed pattern of unfriendingC.suggest people to have mutual friends of all agesD.show that it is becoming harder to make new friends(5).What can be inferred from the last paragraph?（分数：14.20）A.Facebook is not a perfect environment for making new frie
24、nds.B.Principles for friendship do not change in the online environment.C.The more friends you have in the real life, the fewer you have online.D.Most of us do not like to make friends with introverted ones.六、Part Translation(总题数：1，分数：20.00)2.秧歌舞 (Yangko dance)是中国汉族的一种传统民间舞蹈，通常在北方省份表演。秧歌舞者通常穿上明亮多彩的表
25、演服装，他们的表演动作迅速有力。在农历春节、元宵节等节日期间，人们一旦听到锣鼓声，不管外面天气有多冷，他们都会蜂拥到街上观看秧歌舞表演。近年来，中国东北某些城市的老年人自发组织了秧歌队，队员常年通过跳舞来保持健康，同时他们也乐在其中。 （分数：20.00）_大学英语四级分类模拟题 509答案解析(总分：202.50，做题时间：90 分钟)一、Part Writing(总题数：1，分数：106.50)1.Directions: For this part, you are allowed 30 minutes to write an essay commenting on one of the
26、most popular sentences online, “REMEMBER. always act like you“re wearing an invisible crown.“ You can cite examples to illustrate your point. You should write at least 120 words but no more than 180 words. （分数：106.50）_正确答案：()解析：The Importance of Self-confidence One of the most popular sentences onli
27、ne states that “REMEMBER. always act like you“re wearing an invisible crown.“ What the saying indicates is the importance of self-confidence, an attitude that we should take towards our life. Here are two main reasons why we should be confident. First , it is the foundation of individual success. In
28、 reality, to achieve even the smallest goals, and to take on daily duties and responsibilities in life, we have to have self-confidence. For example, when we go for a job interview, if our body language gives any indication of uncertainty , the interviewer may pick up on that and probably will give
29、the job to someone else. Second , a confident man is less likely to feel fearful, angry and depressed. The more confident we are, the less disappointed we will feel upon being rejected . In conclusion , self-confidence will enable us to persevere when suffering setbacks until we succeed, while lack
30、of confidence will definitely have a negative effect on our social relations, career prospects and our mood. 解析 引入网络流行话语。 指出流行话语所体现的意思。 指出我们需要自信的两条理由。 用 First.Second.结构引出具体的理由，结构清晰简洁。 总结全文。二、Part Reading Compr(总题数：0，分数：0.00)四、Passage One(总题数：1，分数：5.00)For thousands of years, people thought of glass
31、as something beautiful to look at. Only recently have they come to think of it as something to look through. Stores display their goods in large glass windows. Glass bottles and jars that hold food and drink allow us to see the contents. Glass is used to make eyeglasses, microscopes, telescopes, and
32、 many other extremely useful and necessary objects. Until the Second World War, most of the glass used for optical instruments was imported from Europe. However, during the war Americans could not get European glass, and they were forced to make their own. As a result, new kinds of glasses were deve
33、loped that had been previously unknown. These new effects were achieved by mixing other chemical elements with the sand. Some of these new glasses are very strong and can resist many kinds of shocks. Legend has it that a very hard glass was invented by a Roman who showed his discovery to the Emperor
34、. When the Emperor saw the glass he feared that it would become more valuable than gold and silver, malting his treasure worthless. Therefore, he had the glassmaker killed, and the secret was not discovered again for hundreds of years. In the present century, safety glass was invented for use in mod
35、ern cars and planes. Safety glass is made by placing a layer of plastic between two layers of plate glass. When the outside layer of glass is broken, the pieces do not scatter and injure people. Some glass of this type is strong enough to resist bullets. Although in recent years plastics have replac
36、ed glass under conditions where glass might be easily broken, there are new uses being developed, for the greatest advantage of glass is that its component parts are inexpensive and can be found all over the world.（分数：5.00）(1).With the passage of time, glass _.（分数：1.00）A.is regarded as transparentB.
37、is no longer seen as decoration C.is used to make things look pleasantD.is widely used to replace steel in making containers解析：本题考查倒装句的理解。从文章第 2句的开头 only recently可知第 1句和第 2句是对比关系：现在的情况与以前不一样了，因此 B为正确选项。选项 A是对原文第 2句话的曲解，虽然这句话中说到的玻璃现在被视为 something to look through，但是，这句话要强调的并不是到现在人们才发现玻璃是透明的，而是要强调玻璃可以被
38、用作工具，透过它去看别的东西。选项 C中的 look pleasant和选项 D在文中都没有提到。(2).Why did Americans make their own glass during the Second World War?（分数：1.00）A.The war blocked the way of glass import. B.They refused to use the European glass.C.The glass made in Europe was out of date.D.They were able to make a new kind of glass
39、.解析：从第 2段的第 1、2 句可以看出，二战前美国从欧洲进口玻璃，而战时却不能从欧洲进口玻璃，也就是说，进口玻璃的渠道应是被战争中断了，因此答案应为选项 A。选项 D是不能进口玻璃的结果而不是原因。其余两项都没有原文依据。(3).By telling the legend, the author wants to _.（分数：1.00）A.prove that the Roman was the first inventor of hard glassB.support that the Americans were as clever as the RomansC.give some i
40、nteresting information about hard glass D.provide a historical event concerned with hard glass解析：本题考查例子与主题的关系。作者引用传说，只是为了使文章读起来更有趣。这是一个传说，不一定是真实的，因此，它不能被视为选项 D所提及的历史事件，也不能证明是罗马人第一个发明坚固的玻璃，所以选项 A也是不对的。选项 B与本段内容无关，本段主要说明了美国人开发出新的玻璃制品的来由，并无说明美国人聪明之意。(4).All of the following concerning the safety glass
41、are discussed in the text EXCEPT _.（分数：1.00）A.its usesB.its strengthC.its structureD.its limitations 解析：本题考查列举处，用排除法可以找出答案。第 3段中除选项 D外，选项 A可从第 1句推断，选项 B可从最后一句推断，选项 C可从第 2句推断。(5).New uses of glass are being developed on the ground that _.（分数：1.00）A.glass is not as safe as plasticsB.glass is not as st
42、rong and durable as plasticsC.glass is easily obtainable and inexpensive D.glass is more and more widely used解析：本题解题的关键在于注意最后一段中的“there are new uses being developed, for.”，这里表明了一对因果关系，for 后面引出不断研发玻璃新用途的原因，由此可见，本题正确选项应为 C。选项A和 B中提到的玻璃的缺点虽在现实中也是有可能的，但文中并无字句说明因为这些缺点而要不断研发玻璃的新用途。五、Passage Two(总题数：1，分数：7
43、1.00)The word “unfriending“ entered common vocabulary only a few years ago, and since then researchers have been trying to understand why and when it happens. The answers relate to a bigger outstanding question in web science: Are online social relationships fundamentally different to physical world
44、 ties? The likes of Facebook also want to know what drives unfriending, because decaying friendships is bad for business. Up until now, the evidence suggested that unfriending on online social networks was driven mainly by too-frequent posts about polarising (两极化的) topics. Too much religion? Goodbye
45、. Support gay marriage? Unfriend. And in a recent survey of US adults, 55 percent said they unfriended people because of their offensive status updates or comments. That was the most popular reason, followed by “not knowing the person well“ (41 percent), and “tried to sell me something“ (39 percent)
46、. So far, so unsurprising. Yet Daniele Quercia at the University of Cambridge had doubts about whether politics and rudeness really were the most common reasons for severing Facebook ties. After all, he says, these recent studies and surveys were based on self-reported behaviour, not hard data. And
47、more importantly, the reasons people gave for severing their Facebook ties are not the same factors that lead to the dissolution of offline relationships. So Quercia and his colleagues analysed the dynamics of more than 34,000 Facebook relationships to find patterns that correlated with unfriending.
48、 He presented the results at the Web Science conference in Evanston, Illinois, last month. Sure enough, a lack of similarity, especially between ages, and few mutual friendships were the dominant factors correlating with unfriending all of which mirrors the decline of physical-world relationships. Quercia also found that having a mutual female friend makes unfriending less likely than sharing a male friend. Finally, Quercia also showed that personality type matters. Perhaps not surprisingly, a relationship is more likely to break if one of the
