2019英语四级作文答案 第1篇

A) Today in the United States there are 72,000 centenarians (百岁老人). Worldwide, probably 450,000. If current trends continue, then by 2050 there will be more than a million in the US alone. According to the work of Professor James Vaupel and his co-researchers, 50% of babies born in the US in 2007 have a life expectancy of 104 or more. Broadly the same holds for the UK, Germany, France, Italy and Canada, and for Japan 50% of 2007 babies can expect to live to 107.

B) Understandably, there are concerns about what this means for public finances given the associated health and pension challenges. These challenges are real, and society urgently needs to address them. But it is also important to look at the wider picture of what happens when so many people live for 100 years. It is a mistake to simply equate longevity (长寿) with issues of old age. Longer lives have implications for all of life, not just the end of it.

C) Our view is that if many people are living for longer, and are healthier for longer, then this will result in an inevitable redesign of work and life. When people live longer, they are not only older for longer, but also younger for longer. There is some truth in the saying that “70 is the new 60” or “40 the new 30.” If you age more slowly over a longer time period, then you are in some sense younger for longer.

D) But the changes go further than that. Take, for instance, the age at which people make commitments such as buying a house, getting married, having children, or starting a career； These are all fundamental commitments that are now occurring later in life. In 1962, 50% of Americans were married by age 21. By 2014, that milestone (里程碑) had shifted to age 29.

E) While there are numerous factors behind these shifts, one factor is surely a growing realization for the young that they are going to live longer. Options are more valuable the longer they can be held. So if you believe you will live longer, then options become more valuable, and early commitment becomes less attractive. The result is that the commitments that previously characterized the beginning of adulthood are now being delayed, and new patterns of behavior and a new stage of life are emerging for those in their twenties.

F) Longevity also pushes back the age of retirement, and not only for financial reasons. Yes, unless people are prepared to save a lot more, our calculations suggest that if you are now in your mid-40s, then you are likely to work until your early 70s; and if you are in your early 20s, there is a real chance you will need to work until your late 70s or possibly even into your 80s. But even if people are able to economically support a retirement at 65, over thirty years of potential inactivity is harmful to cognitive (认知的) and emotional vitality. Many people may simply not want to do it.

G) And yet that does not mean that simply extending our careers is appealing. Just lengthening that second stage of full-time work may secure the financial assets needed for a 100-year life, but such persistent work will inevitably exhaust precious intangible assets such as productive skills, vitality, happiness, and friendship.

H) The same is true for education. It is impossible that a single shot of education, administered in childhood and early adulthood, will be able to support a sustained, 60-year career. If you factor in the projected rates of technological change, either your skills will become unnecessary, or your industry outdated. That means that everyone will, at some point in their life, have to make a number of major reinvestments in their skills.

I) It seems likely, then’ that the traditional three-stage life will evolve into multiple stages containing two, three, or even more different careers. Each of these stages could potentially be different. In one the focus could be on building financial success and personal achievement, in another on creating a better work/life balance, still another on exploring and understanding options more fully, or becoming an independent producer, yet another on making a social contribution. These stages will span sectors, take people to different cities, and provide a foundation for building a wide variety of skills.

J) Transitions between stages could be marked with sabbaticals (休假) as people find time to rest and recharge their health, re-invest in their relationships, or improve their skills. At times, these breaks and transitions will be self-determined, at others they will be forced as existing roles, firms, or industries cease to exist.

K) A multi-stage life will have profound changes not just in how you manage your career, but also in your approach to life. An increasingly important skill will be your ability to deal with change and even welcome it. A three-stage life has few transitions, while a multi-stage life has many. That is why being self-aware, investing in broader networks of friends, and being open to new ideas will become even more crucial skills.

L) These multi-stage lives will create extraordinary variety across groups of people simply because there are so many ways of sequencing the stages. More stages mean more possible sequences.

M) With this variety will come the end of the close association of age and stage. In a three-stage life, people leave university at the same time and the same age, they tend to start their careers and family at the same age, they proceed through middle management all roughly the same time, and then move into retirement within a few years of each other. In a multi-stage life, you could be an undergraduate at 20, 40, or 60; a manager at 30, 50, or 70; and become an independent producer at any age.

N) Current life structures, career paths, educational choices, and social norms are out of tune with the emerging reality of longer lifespans. The three-stage life of full-time education, followed by continuous work, and then complete retirement may have worked for our parents or even grandparents, but it is not relevant today. We believe that to focus on longevity as primarily an issue of aging is to miss its full implications. Longevity is not necessarily about being older for longer. It is about living longer, being older later, and being younger longer.

36. An extended lifespan in the future will allow people to have more careers than . Just extending one's career may have both positive and negative . Nowadays, many Americans have on average delayed their marriage by some eight . Because of their longer lifespan» young people today no longer follow the pattern of life of their parents or . Many more people will be expected to live over 100 by the mid-21st . A longer life will cause radical changes in people's approach to . Fast technological change makes it necessary for one to constantly upgrade their . Many people may not want to retire early because it would do harm to their mental and emotional . The close link between age and stage may cease to exist in a multi-stage . People living a longer and healthier life will have to rearrange their work and life.

2019英语四级作文答案 第2篇

中国科学院近代物理研究所开展了重离子治癌临床实验，开辟了癌症治疗的新途径。所谓重离子，是指重于2号元素氦并被电离的粒子。与常规放疗射线相比，重离子以其在物质中的剂量损失集中于射程末端的物理学特性和高的相对生物学效应，用于治癌时具有明显的优势：对病灶周围健康组织损伤最小，对癌细胞伤效果最佳，在线精确监控照射位置和剂量，疗程短、无痛苦，几乎没有副作用。因此，重离子被国际上公认为二十一世纪最理想的放疗用射线，特别适宜于外科手术、化疗、常规放疗无效或易复发的难治病例。2006年11月至2009年7月期间，研究所有8批88例浅层肿瘤患者，用中能碳离子束治疗并取得成功。一个疗程结束，肿瘤普遍缩小40%—60%；结束2—3个月时，大部分肿瘤完全消失，大多数肿瘤的\'控制率都在90%以上，疗效十分显著，整个治疗过程没有采用任何辅助药物，至今没有发现明显的副作用。目前美国等发达国家以此已治疗各种癌症6000多例。

另据日前美国华盛顿大学的科学家公布，他们借助纳米技术，开发出一种在显微镜下才能看到的“纳米蜜蜂”。“小蜜蜂”能钻进癌细胞，释放出癌良药，将癌细胞一个个消灭掉。而小蜜蜂比人的发丝还要小几千倍。“小蜜蜂”背上有一个特殊的包裹，包裹里装的是令常人闻之色变的蜂毒肽。研究人员称，蜂毒肽是非常好的癌良药。“小蜜蜂”内部还有专门的定位物质，能够指引它一路前行，直达患处。在实验中，“纳米蜜蜂”已经令患有乳腺癌的小白鼠体内的癌细胞减少了45%，而患有皮肤癌的小白鼠体内的癌细胞则锐减了75%之多。让人惊喜的是，这种治癌方法无任何副作用而且便宜。目前，实验鼠并没有出现掉毛或者恶心的症状。而且蜂毒肽是一种能够大批量生产的廉价产品。华盛顿大学的科学家表示，在“纳米蜜蜂”的帮助下，他们相信在不久的将来这项先进的技术就能够应用于人体，在没有巨大痛苦的情况下使全世界的癌症患者重新找回健康快乐的生活。

1.目前正在临床实施的治癌方法有哪几种？(3分

2.重离子治癌在治疗方法和疗效上有什么特点？(3分

3.根据文意下列判断是否正确。请指出来，并简述理由。(4分

①重离子射线和“纳米蜜蜂”治癌方法让人惊喜的是无任何副作用。

②用中能碳离子束进行治疗肿瘤，治疗结束2—3个月时，肿瘤的控制率都在90%左右。

参考答案：

1.外科手术、化疗、常规放疗、重离子放疗。

2.（1）在物质中的剂量损失集中于射程末端的物理学特性和高的相对生物学效应。

3.①错误。重离子射线治癌至今没有发现明显的副作用。表达不切合实际情况。②错误。大多数肿瘤的控制率都在90%以上。删去“大多数”就不切合实际情况。

2019英语四级作文答案 第3篇

Dear Tom,

    On hearing that you are planning to learn Chinese in China and ask me to recommend a place, I'd like to recommend our capital city, Beijing, an international metropolis.

    I recommend Beijing to you because of the following reasons. First of all, there are a lot of English-speaking foreigners in Beijing, which helps you adapt to life here very quickly. Furthermore, as the capital of several dynasties, Beijing has a profound cultural background, so you can better experience the extensive and profound traditional Chinese culture. Last but not least, with many people understand and master both Chinese and English, Beijing has a good bilingual atmosphere. It is good for you to improve your Chinese. You could communicate with local people in Chinese as much as possible because practice makes perfect.

    I truly hope that you can come to Beijing and learn Chinese here. I'm looking forward to your arrival. If you have any question about the city, please feel free to contact me for further information.

                                              Yours sincerely, Li Ming

2019英语四级作文答案 第4篇

Dear Tom,

On hearing that you are planning to teach English in China and ask me to recommend a city, I'd like to recommend our capital city, Beijing, an international metropolis.

The reasons why I recommend Beijing can be listed as follows. First of all, there are a lot of English-speaking foreigners in Beijing, which helps you adapt to life here very quickly. Furthermore, as the capital of several dynasties, Beijing has a profound cultural background, so you can better experience the extensive and profound traditional Chinese culture. Most importantly, parents in Beijing, an international metropolis with many multinational companies, attach great importance to their children's English learning and many people who work in multinational companies also need to learn English.

I truly hope that you can come to Beijing to start your teaching life and I'm looking forward to your arrival. If you have any question about the city, please feel free to contact me for further information.   

                                                                         Yours sincerely, 

                                                                         Li Ming

2019英语四级作文答案 第5篇

9. B【解析】熟悉。3分。

10. A【解析】A.连词，虽然。B.转折连词，然而/代词，这样C.连词，并且/连词，却D.连词，因为/介词，拿。3分。

11. A【解析】小户人家不懂得分开来消除疑忌。3分。

12.三 宝 仍 投 旧 媒 媪 /又 引 与 一 家 为 馆 僮 /久 而 微闻 四 宝 所 在/ 乃 夤缘 入 郑 氏 家 /数 日 后/ 得 见 四 宝/ 相 持 痛 哭/ 时 已 十 三 四 矣。

【评分标准】断对两处得1分，断错两处扣1分。共3分，扣完为止。

13. （1）xxx本来就善良懦弱，二牛、xxx也是愚笨的乡民，听说违背法令罪行重大，都吓得停止了这件事。

【评分标准】“故”“良”“懦”“乡愚”“慑”“止”共2分，错2词扣1分。全句大意1分，共3分。

（2）只是xxx做出这种罪孽的事，不知什么想法，也不知他的结局。但是，天理昭昭，应该不会有好报的。

【评分标准】“恶业”“心”“究竟”“善”共2分，错2词扣1分。全句大意1分，共3分。

14. 参考示例：

2019英语四级作文答案 第6篇

This cartoon is silly, and yet compelling: a large customer holds a hopelessly small piece of cloth as the tailor carefully measures. Such an image suggests that one needs to consider practical reality in the pursuance of goals. Merely acting on one's desires, while ignoring the facts at hand, cannot lead to success.

The fact that currently there are more graduates than jobs reminds us of the importance of rational thinking. Every year approximately 3 million students graduate from universities and begin looking for work. Many of them fail to find suitable employment because there are simply not enough opportunities to accommodate such great numbers of graduates. In addition, however, one might also cite flawed individual assessment as a reason.

In order to create a realistic target for one's future, one must make rational decisions and prepare accordingly. A student who aims to be a surgeon, for example, must take care to acquire opportunities to do clinical practice and gain sufficient knowledge. In other words, customers would do well to take accurate measurements before purchasing their fabric. A small piece of cloth cannot adequately clothe a large person.

2019英语四级作文答案 第7篇

Dear Tom,

I was so delighted to receive the letter from you. On hearing that you are planning to study in China, I decide to write you a letter to recommend a university. My recommendation is Xiamen University, which is one of the most outstanding universities in China.

The reasons why I recommend this university can be listed as follows. First of all, Xiamen University is located in a coastal city, Xiamen, which has beautiful and attractive seaside scenery. If you study here, you can have a walk and breathe the fresh air at the end of the day's study. How comfortable and enjoyable! More importantly, Xiamen University has a high reputation for its academic contributions to China and the world.

I truly hope that you can come to Xiamen University to start your college life and I am looking forward to your arrival. If you are interested in my recommendation and want to know more detail about the university, please feel free to contact me.

                                                   Yours sincerely

                                                   LI Ming 

2019英语四级作文答案 第8篇

In the cartoon we can see a large person being measured by a tailor to get suitable clothes made. Anything to be done must be measured in advance so that we are able to find a proper way to do it. If the tailor does not take measurements of the man, then he would not be able to make suitable clothes for this person.

This same principle applies to solving any other problem. Firstly, when we want to know the reality of something, we must describe it like it is, getting rid of our prejudices and exaggerations, so that we can have an unbiased view. Secondly, the object should be analyzed in a concrete way so that we can grasp the reasons and rules of it. Thirdly, we must adapt our approach to solving a problem, for each situation is different from the others. So we must view a problem from different perspectives.

The cartoon implies different meanings to different people. A teacher should adopt different teaching methods according to the students in the class; a doctor should prescribe different treatments according to the patient's symptoms; a farmer should seed different plants according to the various conditions of the earth. From a philosophical point of view, dissimilarproblems should be approached differently. Good results come from attentive analysis of a problem.

英语漫画作文写作指导

第一、读图审题

四级漫画作文中的漫画通常反映一个社会现象或生活哲理，要求考生根据自己对漫画的理解来写作。因此，要写好四级漫画作文，审题格外重要。考生在下笔之前要仔细看漫画，弄清漫画的寓意，这是文章切题的保证。此外，在本次四级考试的三道写作题中，Directions部分都给出了写作内容的大致方向，这也为考生把握漫画寓意提供了帮助。下面笔者就来逐一梳理2013年6月四级作文的三幅漫画及其传达的寓意。

第二、谋篇布局

在把握文章的主旨之后，考生就可以构思整篇文章的架构了。四级漫画作文的写作可以分为下面三个段落。

第一段：开门见山，简要描述一下漫画内容，并指出漫画的寓意。描述漫画内容是为了揭示其中的寓意，是手段而不是目的，所以描述要简洁明快，一般来说一句话足矣。需要提醒考生的是，写作的Directions部分虽然给出了大致的写作主题，但是也要求考生对漫画进行简要描述，因此考生切不可抛开漫画内容直接展开议论。

第二段：表达考生对漫画寓意的看法，这是文章的重心所在。比如，就第一道写作题目而言，考生应在第二段阐述阅读文学作品的重要性;就第二道写作题目而言，考生应在第二段论述为什么凡事必须从小事做起;就第三道写作题目而言，考生应在第二段论述掌握基本技能的重要性。

第三段：指出漫画的寓意对大学生的教育意义，或者提出解决问题的建议。考生需要注意的是，结尾段一般并不需要实质性的分析，其主要作用是总结和升华，使文章结构完整。所以结尾段的写作要简明扼要，点到即止。

第三、论证方法

漫画作文的第二段要表达考生对漫画寓意的看法，这是文章的核心段落，也是作文字数达到要求的关键。因此，考生在这一段要浓墨重彩，写深、写透。在写这一段时，考生要尽量摆事实、讲道理，避免空泛的议论。针对这一核心段落，笔者在此推荐以下三种展开议论的常用方法，希望对考生有所启发。

1.条分缕析

在写作第二段时，考生可以从2～3个方面对观点展开论述，这种写法可使文章显得层次清楚、条理清晰。例如，本次四级作文第一道题目的第二段需要阐述阅读文学作品的重要性，考生就可以从以下两个方面展开：第一，相对于电子媒体，文学阅读更能培养人的想象力;第二，阅读文学作品能够帮助我们更好地了解社会。请参考下面的\'xxx。

There wasa time when children could relish (欣赏/ 也可以使用appreciate 替换 literature. But childrentoday can enjoy the sounds and action on a TV or computer screen. “So why bother reading?” some ask. The reasonis obvious： It enriches our imagination. When we read apiece of literature， we are living the life of RobinHood or starting an adventure with Tom Sawyer. In addition， literature is the mirror of society，whether it be poetry， drama or fiction. We know thesociety better through literature.

2.举例论证

如果漫画所传达的是抽象的人生哲理，那么考生在论述时最好能举出具体的事例，尽量避免空洞的说教。比如，就本次四级作文第二道题目而言，考生可以在第二段中举出一些成功人士如何从小事做起的例子。笔者下面提供的xxx中用到的是xxx桑德斯上校从一个小吃店做起，最后缔造出遍布全球的肯德基快餐帝国的例子，用以证明只有从小事做起，才能成就大事。请看下面的xxx。

Everything is smallbefore it is big. A good example is KFC. In 1930 Colonel Harland Sanders beganserving food to his service station customers in Corbin， a city in Kentucky. He fried chicken in his own kitchen andperfected his secret recipe there. From the small roadside eatery， he went on to build an empire of fast food.

3.类比论证

如果漫画中的寓意不容易通过具体的事例来证明，那么考生还可以使用类比论证的方法，即通过打比方来论证一个抽象的道理。比如，对于本次四级作文的第三道题目，考生可以在第二段中用学习打篮球的过程来打比方。学习打篮球时，只有先学会了投球、运球、传球这些基本技能，才能进一步学习高难度的技能。以此类推，无论做任何事情，只有掌握了基本的技能，才可能取得更大的成功。此外，考生还可以举出统计数字，用具体的研究结果来证明论点。请看下面的xxx。

Simple as they mayseem， basic skills serve as the first link in the chain of success. Thisis analogous to learning to play basketball. If shooting， dribbling and passing are not mastered，learning advanced skills will become difficult， if notimpossible. A growing body of research has also documented that such basicskills as reading， writing and computing are highlycorrelated with success later in life. A 2012 study surveyed 300 CEOs ofFortune 500 companies and found that 87% attributed part of their success tothe basic skills they learned in primary school.

2019英语四级作文答案 第9篇

In the classic marriage vow (誓约), couples promise to stay together in sickness and in health. But a new study finds that the risk of divorce among older couples rises when the wife—not the husband— becomes seriously ill.

_Married women diagnosed with a serious health condition may find themselves struggling with the impact of their disease while also experiencing the stress of divorce,_ said researcher Amelia Karraker.

Karraker and co-author Kenzie Latham analyzed 20 years of data on 2,717 marriages from a study conducted by Indiana University since 1992. At the time of the first interview, at least one of the partners was over the age of 50.

The researchers examined how the onset (发生) of four serious physical illnesses affected marriages. They found that, overall, 31% of marriages ended in divorce over the period studied. The incidence of new chronic (慢性的) illness onset increased over time as well, with more husbands than wives developing serious health problems.

_We found that women are doubly vulnerable to marital break-up in the face of illness,_ Karraker said. _They're more likely to be widowed, and if they're the ones who become ill, they're more likely to get divorced._

While the study didn't assess why divorce is more likely when wives but not husbands become seriously ill, Karraker offers a few possible reasons. _Gender norms and social expectations about caregiving may make it more difficult for men to provide care to sick spouses,_ Karraker said. _And because of the imbalance in marriage markets, especially in older ages, divorced men have more choices among prospective partners than divorced women._

Given the increasing concern about health care costs for the aging population, Karraker believes policymakers should be aware of the relationship between disease and risk of divorce.

_Offering support services to spouses caring for their other halves may reduce marital stress and prevent divorce at older ages,_ she said. _But it's also important to recognize that the pressure to divorce may be health-related and that sick ex-wives may need additional care and services to prevent worsening health and increased health costs._

46. What can we learn about marriage vows from the passage?A) They may not guarantee a lasting ) They are as binding as they used to ) They are not taken seriously any ) They may help couples tide over hard times.

47. What did Karraker and co-author Kenzie Latham find about elderly husbands?A) They are generally not good at taking care of ) They can become increasingly vulnerable to serious ) They can develop different kinds of illnesses just like their ) They are more likely to contract serious illnesses than their wives.

48. What does Karraker say about women who fall ill?A) They are more likely to be ) They are more likely to get ) They are less likely to receive good ) They are less likely to bother their spouses.

49. Why is it more difficult for men to take care of their sick spouses according to Karraker?A) They are more accustomed to receiving ) They find it more important to make money for the ) They think it more urgent to fulfill their social ) They expect society to do more of the job.

50. What does Karraker think is also important?A) Reducing marital stress on ) Providing extra care for divorced ) Stabilizing old couples' ) Making men pay for their wives, health costs.

2019英语四级作文答案 第10篇

1. D) The number of male nurses has gone down.

2. A) Cultural bias.

3. C) He was almost drowned.

4. B) The emergency services are efficient.

5. A) It became an online star.

6. B) Release it into the wild.

7. D) The raccoon did something no politician could.

2019英语四级作文答案 第11篇

The concept of family in China is related to its cultural traditions. Large and harmonious families were once very enviable. In the past, four generations living together were not uncommon. Because of this tradition, many young people continue to live with their parents after marriage. Today, that tradition is changing. With the improvement of housing conditions, more and more young couples choose to live apart from their parents. But the connection between them is still intimate. Many old people still help to look after their grandchildren. Young couples also spare time to visit their parents, especially during important holidays, such as the Spring Festival and the Mid-Autumn Festival.

2019英语四级作文答案 第12篇

51-55 DADDB

51. D) It gets energy from both food and sunlight.

52. A) The genes it captures from the sea plant algae.

53. D) They can produce chlorophyll on their own.

54. D) They can readily be converted to sea slug genes.

55. B) They can survive for months without eating. 

2019英语四级作文答案 第13篇

16. C) They are more likely to become engineers.

17. D) Respond more positively to boys’ comments.

18. A) Offer personalized teaching materials.

19. C) It does not rain as much as people think.

20. B) The rain is usually very light.

21. D) It has mild weather both in summer and in winter.

22. D) It comes from straining one's muscles in an uncommon way.

23. A) Blood flow and body heat increase in the affected area.

24. B) About two days.

25. C) Have a hot shower.

2019英语四级作文答案 第14篇

的确，我们想象不了出现在三维空间背景上的四维物体是什么样子。正如同我们不可能将一个三维物体压进一个平面那样。当然我们确实可以在二维的平面上画出三堆的物体来。因而从某种意义上来说，是将一个三雏物体压进了一个平面，然而，这种压法是用几何投影的方法进行的。同样，我们可以说，尽管不能把一个四维物体压进三雏空间．但我们能够讨论四雏物体在三维空间的投影。不过要记住，四维物体在三堆空间的投影是立体图形。正像三维物体在平面上的投影是二维图形一样。

但是。只要再思考一下，你就会意识到．把第四个方向看得太神秘是毫无必要的。事实上．有一个我们几乎每天要用的字眼可以用来表示．并且也的确就是物理世界的第四个独立的方向，这个字眼就是时间，所有的实际物体都是四维的：三维属于空间，xxx属于时间。从这个新观念出发，一个四雏正方体就是一个存在了一段时间的三堆立方体。

1选出说法不正确的一项 (

A．文中的“维”是指方向。

B．文中的“二维”是指高(长、宽．即平面是二维的。

C．文中的“三维”是指高(长、宽、厚，即立体是三维的。

D．根据B、C提供的条件．我们可以知道“点”是“xxx”的。

2第一段的意思是 (

A．四维空间很神秘的说法是错误的。

B．人类尚不具备探讨四维空间的条件。

C．人类的三维头脑不能想象出四维的情景。

D．人类的思维障碍造成了四维空间的神秘化。

3“看得太神秘”是指 (

A．宇宙中还有未被发现的第四维。

B．宇宙中是否有第四维存在是不可知的。

C．作为第三维空间中的人无法认识第四维。

D．“第四维”概念的提出与人们的传统观念不相符。

4下列说法与文意吻合的一项是 (

A．我们所处的.是一个三维空间，这一空间之外还有一个未被认识的四维空间存在。

B．我们所处的空间本身就是一个四维空间，我们所知的三维体实际上都是四维体。

C．所谓四维空间是一种理论上的假说，实际上是不存在的。

D．由于人们暂时还未发现第四维，便用“时间”来代替第四维。

参考答案：

（本题考查对文中的信息进行筛选和辨析的能力。A此说法的搜选区间在第三段“第四个独立的方向”处；B此说法的搜选区间在第一、二段；C项的搜选区间在第二段；D项“点”不是xxx的．应是二维的。）…点此进入高中说明文阅读训练参考答案100则查看完整参考答案（本文答案在第3页）…（A项第四段说“一个四维正方体就是一个存在了一段时间的三维立方体”．可见，对四维的概念，人们是有认识的；另外“所有的实际物体都是四维的”，也证明此项错。B项内容可从第三段中找到。由B项可证明C错。D项原文说时间“的确就是物理世界的第四个方向”，即第四维。）

2019英语四级作文答案 第15篇

51-55 CBBAD

51. C）Not all of them achieved their anticipated goals   

52. B）To identify reasons for their different outcomes    

53. B）Its interaction with prospective donors   

54. A）They should be small to be successful   

55. D）Their feeling of connection to the scientists themselves