5 . My best friend traveled to stay with our family last weekend. When she arrived, she went straight to the kitchen and, without asking, ate a spoonful of raspberry jam and some dried fruit. She wasn’t being rude. I knew she would do this. We’ve known each other for almost 20 years. She can eat anything she wants from my kitchen. Indeed, I bought her favorite fruits and snacks at the shop that morning.

Our long weekend together was luxuriously (惬意地) simple. I was recovering from surgery (手术) and couldn’t go to shopping malls. We passed the time running errands (做杂事), going to the post office and collecting dry cleaning. We drank way too many cappuccinos. But we talked about every little detail of our lives.

There’s never been a quiet moment in our friendship. We’ve lived in different cities for almost a decade. Reunions demand constant conversation. our personalities are matched, to be sure, and a shared history is indescribably valuable. We were competitors in high school before bonding over a bad experience. Then we discovered the many interests that we had in common. Our friendship cemented (巩固) itself quickly. We stayed companions through law school, through our first jobs and our first boyfriends. We supported each other through break-ups and breakthroughs. Ours is a friendship for the ages.

There is something special about friends who know everyone and everything about you. They are rare. These are the people you’ve chosen to witness your life. They have seen the bright lights of achievement, the depths of despair (绝望) and the boring routine (平淡乏味) of the in-between.

It’s special to unpack feelings and frustrations without wasting time filling in the blanks. As my long weekend shows, with such friends we don’t have to “do”, we simply have to “be”. We drop the act, the performance, the public version of ourselves.

The special friendships are those which never fail to delight, the continuation of which is worth the extra effort, despite distance and difference sneaking (溜进) into your separate lives. I had the very great joy of this reminder last weekend. I’m lucky to have found this friend, to see a future where her companionship remains. Being together is perfection.

1. What happened during her best friend’s visit?

A．They enjoyed an eventful long weekend.	B．They bonded by having long conversations.
C．They made their favorite snacks and coffee.	D．They talked about recent news events.

2. One thing that the author appreciates about their friendship is that ______.

A．they help each other deal with the boredom of life

B．they prefer to witness each other’s lives from far away

C．they try to show each other their best selves

D．they are comfortable being themselves when together

3. Which of the following would the author agree with?

A．Charm comes from differences.	B．Politeness brings best friends closer.
C．Good friendships last naturally.	D．Good friendships need devotion.

4. The author’s main purpose in writing this article is to ______.

A．describe what her best friend is like	B．tell about the friendship she treasures
C．explore the key aspects of friendship	D．express thanks to her best friend

6 . The history of microbiology begins with Dutch cloth maker named Antoni van Leeuwenhoek, a man of no formal scientific education. In the late 1600s. Leeuwenhoek, inspired by the magnifying lenses（放大镜）he used to examine cloth, built some of the first-microscopes. He developed technique to improve the quality of tiny, rounded lenses, some of which could magnify an object up to 270 times. After removing some plaque from between his teeth and examining it under a lens, Leeuwenhoek found tiny twisting creatures, which he called “animalcules”.

His observations, which he reported to the Royal Society of London, are among the first descriptions of microbes（微生物）. Leeuwenhoek discovered an entire universe invisible to the human eye. He found different microbes in samples of pond water, rain water, and human blood. He gave the first description of red blood cells, observed plant tissue, examined muscle, and investigated the life cycle of insects.

Nearly two hundred years later, Leeuwenhock’s discovery of microbes helped French chemist and biologist Louis Pasteur to develop his “theory of disease”. This concept suggested that disease originates from tiny organisms attacking and weakening the body. Pasteur’s theory later helped doctors to fight infectious diseases including anthrax, diphtheria, polio, smallpox, tetanus, and typhoid. All these breakthroughs were the result of Leeuwenhoek’s original work. Leeuwenhoek did not foresee this legacy.

In a 1716 letter, he described his contribution to science this way: “My work, which I’ve done for a long time, was not pursued in order to gain the praise I now enjoy, but chiefly from a strong desire for knowledge, which I notice resides in me more than in most other men. And therefore; whenever I found out anything remarkable, I have thought it my duty to put down my discovery on paper, so that the scientific community might be informed thereof.”

1. Which of the following best describes Leeuwenhoek?

A．trained researcher with an interest in microbiology

B．A curious amateur who made pioneer studies of microbes

C．A talented scientist interested in finding a cure for disease

D．A bored cloth maker who accidentally made a major discovery

2. The underlined phrase “this legacy” in paragraph 3 refers to ________.

A．the discovery of microbes

B．Pasteur’s theory of disease

C．Leeuwenhoek’s contribution

D．the origin of the tiny organism

3. What does the quote from Leeuwenhock’s letter suggest?

A．He admitted that many of his discoveries happened by chance.

B．He considered his work to be central to later medical breakthroughs.

C．He was greatly concerned with improving people’s living conditions.

D．He believed the sharing of knowledge was a key to scientific progress

4. What is the correct order for the following events?
a. Magnifying lenses were built.
b. The “theory of disease” was put forward
c. Microbes were discovered in samples of waters.
d. Leeuwenhoek’s first microscopes were successfully developed.
e. Leeuwenhoek explained his thoughts upon his own contribution.

A．a-d-c-e-b

B．d-a-c-e-b

C．a-c-d-b-e

D．d-a-e-b-c

7 . Albert Einstein’s 1915 masterpiece “The Foundation of the General Theory of Relativity” is the first and still the best introduction to the subject, and I recommend it as such to students. But it probably wouldn’t be publishable in a scientific journal today.

Why not? After all, it would pass with flying colours the tests of correctness and significance. And while popular belief holds that the paper was incomprehensible to its first readers, in fact many papers in theoretical physics are much more difficult.

As the physicist Richard Feynman wrote, “There was a time when the newspapers said that only 12 men understood the theory of relativity. I do believe there might have been a time when only one man did, because he was the only guy who caught on, before he wrote his paper. But after people read the paper a lot understood the theory of relativity in some way or other, certainly more than 12.”

No, the problem is its style. It starts with a leisurely philosophical discussion of space and time and then continues with an exposition of known mathematics. Those two sections, which would be considered extraneous today, take up half the paper. Worse, there are zero citations of previous scientists’ work, nor are there any graphics. Those features might make a paper not even get past the first editors.

A similar process of professionalization has transformed other parts of the scientific landscape. Requests for research time at major observatories or national laboratories are more rigidly structured. And anything involving work with human subjects, or putting instruments in space, involves piles of paperwork.

We see it also in the Regeneron Science Talent Search, the Nobel Prize of high school science competitions. In the early decades of its 78-year history, the winning projects were usually the sort of clever but naive, amateurish efforts one might expect of talented beginners working on their own. Today, polished work coming out of internships(实习) at established laboratories is the norm.

These professionalizing tendencies are a natural consequence of the explosive growth of modern science. Standardization and system make it easier to manage the rapid flow of papers, applications and people. But there are serious downsides. A lot of unproductive effort goes into jumping through bureaucratic hoops(繁文缛节), and outsiders face entry barriers at every turn.

Of course, Einstein would have found his way to meeting modern standards and publishing his results. Its scientific core wouldn’t have changed, but the paper might not be the same taste to read.

1. According to Richard Feynman, Einstein’s 1915 paper ________.

A．was a classic in theoretical physics

B．turned out to be comprehensible

C．needed further improvement

D．attracted few professionals

2. What does the underlined word “extraneous” in Paragraph 4 mean?

A．Unrealistic.	B．Irrelevant.
C．Unattractive.	D．Imprecise.

3. According to the author, what is affected as modern science develops?

A．The application of research findings.

B．The principle of scientific research.

C．The selection of young talents.

D．The evaluation of laboratories.

4. Which would be the best title for this passage?

A．What makes Einstein great?

B．Will science be professionalized?

C．Could Einstein get published today?

D．How will modern science make advances?

8 . Modern medicine’s ability to keep us alive makes it tempting to think human evolution may have stopped. But if we look at the rate of our DNA’s evolution, we can see that human evolution hasn’t stopped – it may even be happening faster than before.

Evolution is a gradual change to the DNA of a species over many generations. It can occur by natural selection, when certain traits created by genetic changes help an organism survive or reproduce. Such genes are thus more likely to be passed on to the next generation, so they increase in frequency in a population. Gradually, these changes and their associated traits become more common among the whole group.

By looking at global studies of our DNA, we can see evidence that natural selection has recently made changes and continues to do so. Though modern healthcare disrupts a key driving force of evolution by keeping some people alive longer, in countries without access to good healthcare, populations are continuing to evolve. Survivors of infectious disease outbreaks drive natural selection by giving their genetic resistance to offspring. Our DNA shows evidence for recent selection for resistance of killer diseases like Lassa fever and malaria. Selection in response to malaria remains in regions where the disease remains common.

Humans are also adapting to their environment. Gene change allowing humans to live at high altitudes have become more common in populations in Tibet, Ethiopia, and the Andes. The spread of genetic changes in Tibet is possibly the fastest evolutionary change in humans, occurring over the past 3,000 years. This rapid increase in frequency of a mutated gene that increases blood oxygen content gives locals a survival advantage in higher altitudes, resulting in more surviving children.

Diet is another source for adaptations. Studies show that natural selection favoring a change allowing adults to produce lactase – the enzyme (酶) that breaks down milk sugars – is why some groups of people can digest milk. Over 80 per cent of northwest Europeans can, but in parts of East Asia, where milk is much less commonly drunk, an inability to digest lactose is the norm. Like high altitude adaptation, selection to digest milk has evolved more than once in humans and may be the strongest kind of recent selection.

Yet, despite these changes, natural selection only affects about 8 per cent of our genome. But scientists can’t explain why some genes are evolving much faster than others. We measure the speed of gene evolution by comparing human DNA with that of other species. One fast-evolving gene is human accelerated region 1 (HAR1), which is needed during brain development. A random section of human DNA is on average more than 98 per cent identical to the chimp comparator, but HAR1 is so fast evolving that it’s only around 85 per cent similar. Though scientists can see these changes are happening – and how quickly – we still don’t fully understand why fast evolution happens to some genes but not others.

1. Which of the following statements may the author agree with?

A．Evolution occurs among several people overnight.

B．Genes may change and some are beneficial to people’s lives.

C．Evolution is done when the whole population possesses a certain gene.

D．The changed genes leading to higher survival rates are chosen deliberately.

2. The underlined word “disrupts” in paragraph 3 can be best replaced by________.

A．explains

B．causes

C．upsets

D．heals

3. The author illustrates humans’ ongoing evolution with the following examples EXCEPT that__________.

A．some people can resist infectious diseases like malaria

B．children in Tibet tolerate living environments with thin air

C．northwestern Europeans digest lactose better than East Asians

D．the human gene HAR1 resembles that of a chimp to a lesser extent

4. Which of the following may serve as the title?

A．What Is Natural Selection?

B．Are Humans Still Evolving?

C．Why Will Certain Genes Evolve?

D．How Do Mutated Genes Function?

9 . The outstanding biography — from the same author who brought us Steve Jobs and Einstein — portrays the life of the complicated Renaissance (文艺复兴时期的) artist with details. We come to see da Vinci as not only an inventor of musical instruments and early flying machines, but also a notebook keeper and vegetarian (素食者), who had trouble finishing many of the projects and paintings he started.

Yet what is most thrilling is getting to know da Vinci the scientist. Isaacson explains how loving science and applying the scientific method to observing the world was really what made da Vinci a great artist and, Isaacson argues, a genius.

Da Vinci was fascinated with observing and understanding phenomena in nature, from the proportions of the human body to how the muscles of the lips moved. He wanted to know about everything around him, in minute detail, Isaacson writes. He wondered about questions “most people over the age of ten no longer puzzle about”— for instance, how the tongue of a woodpecker works.

To learn about the world, da Vinci combined his own observations with experimentation. Never formally schooled, “he preferred to induce from experiments rather than deduce from theoretical principles,” Isaacson explains. He recorded his observations, looked for patterns among them, and then tested those patterns through additional observation and experimentation.

“When he became fascinated with the idea that he could invent flying machines, three and a half centuries before the Wright brothers flew the first airplane, he observed various birds and filled notebooks with the function and speed at which their wings flapped. That’s why lsaacson calls da Vinci an exemplar of this scientific method.” He goes on: “Galileo, born 112 years after Leonardo, is usually credited with being the first to develop this kind of approach and is often regarded as the father of modern science,” the historian Fritjof Capra wrote. “There can be no doubt that this honor would have been bestowed (赐予) on Leonardo da Vinci had he published his scientific writings during his lifetime, or had his notebooks been widely studied soon after his death.”

Da Vinci’s emphasis on empirical observation also helped him improve his art. First, he was able to use what he learned from looking at nature to paint and draw. His studies of the body, animals, motion, shadow and light, perspective and proportion helped him better understand what he was seeing in front of him, and render it in art more accurately and finely than anyone else of his time. He also used his observations of nature to make connections among phenomena. A recorder (竖笛) was like a larynx (喉管) in the throat. Here’s Isaacson again: What Leonardo probably began as four distinct elements ended up woven together in a way that illustrates a fundamental theme in his art and science: the interconnectedness of nature, the unity of its patterns, and the similarity between the workings of the human body and those of the earth.

Most importantly, his curiosity-driven explorations, and ability to connect art and science, helped him innovate in his work. They helped him think differently, Isaacson argues. Da Vinci made surprisingly diverse series of discoveries, including conceptualizing the helicopter and solar power and advancing knowledge about everything from the reproductive organs to botany. This genius is also what drew lsaacson to Albert Einstein and Steve Jobs as subjects: They’re all innovators who were inspired by and drew connections between art and science.

“Leonardo da Vinci is the ultimate example of the main theme of my previous biographies: how the ability to make connections across disciplines — arts and sciences, humanities and technology — is a key to innovation, imagination, and genius,” Isaacson writes. And this wonderful book is a reminder, in a time of increasingly narrow specialization and focus, that the methods of Renaissance men like da Vinci are as relevant as ever.

1. What made da Vinci’s thinking different from others?

A．He was used to skipping school.

B．He kept his childhood’s sense of curiosity.

C．He was filled with ambition to become an artist and inventor.

D．He developed a fascination with historical novels.

2. Why does Isaacson mention Galileo in the book?

A．To introduce his important findings.

B．To memorize the father of modern science.

C．To show the prejudice faced by da Vinci during his lifetime.

D．To illustrate the significance of da Vinci' s research method.

3. The underlined word “render”in Paragraph 6 can be replaced by “______”

A．express

B．mix

C．confirm

D．associate

4. What does Isaacson think of the methods of Renaissance men?

A．They are too complicated to understand.

B．They focus on the workings of the human body.

C．They are more accurate than modern methods.

D．They still apply to contemporary scientific research.

5. What might be the best title for the passage?

A．How a Genius Changed the World

B．The Features of Renaissance Art

C．How Science Shaped His Art

D．The Comparison between Induction and Deduction

10 . Types of Social Groups

Life places us in a complex web of relationships with other people. Our humanness arises out of these relationships in the course of social interaction. Moreover, our humanness must be sustained through social interaction -- and fairly constantly so. When an association continues long enough for two people to become linked together by a relatively stable set of expectations, it is called a relationship.

People are bound within relationships by two types of bonds: expressive ties and instrumental ties. Expressive ties are social links formed when we emotionally invest ourselves in and commit ourselves to other people. Through association with people who are meaningful to us, we achieve a sense of security, love, acceptance, companionship, and personal worth. Instrumental ties are social links focused when we cooperate with other people to achieve some goal.

Occasionally, this may mean working with, instead of against, competitors. More often, we simply cooperate with others to reach some end without endowing the relationship with any larger significance.

Sociologists have built on the distinction between expressive and instrumental ties to distinguish between two types of groups: primary and secondary. A primary group involves two or more people who enjoy a direct, intimate, cohesive relationship with one another. Expressive ties predominate in primary groups: we view the people as ends in themselves and valuable in their own right. A secondary group entails two or more people who are involved in an impersonal relationship and have come together for a specific, practical purpose. Instrumental ties predominate in secondary groups ; we perceive people as means to ends rather than as ends in their own right. sometimes primary group relationships evolve out of secondary group relationships. This happens in many work settings. People on the job often develop close relationships with coworkers as they come to share gripes, jokes, gossip, and satisfactions.

A number of conditions enhance the likelihood that primary groups will arise. First, group size is important. We find it difficult to get to know people personally when they are milling about and dispersed in large groups. In small groups we have a better chance to initiate contact and establish rapport with them. Second, face - to - face contact allows us to size up others. Seeing and talking with one another in close physical proximity makes possible a subtle exchange of ideas and feelings. And third, the probability that we will develop primary group bonds increases as we have frequent and continuous contact. Our ties with people often deepen as we interact with them across time and gradually evolve interlocking habits and interests.

Primary groups are fundamental to us and to society. Sociologists view primary groups as bridges between individuals and the larger society because they transmit, mediate, and interpret a society’s cultural patterns and provide the sense of oneness so critical for social solidarity. Primary groups, then serve both as carriers of social norms and as enforcers of them.

1. According to Paragraph 1, which of the following statements is true of a relationship?

A．It is a structure of associations with many people.

B．It should be studied in the course of social interaction.

C．It places great demands on people.

D．It develops gradually over time.

2. Which of the following can be inferred from the author’s claim in paragraph 4 that primary group relationships sometimes evolve out of secondary group relationships?

A．Secondary group relationships begin by being primary group relationships.

B．A secondary group relationship that is highly visible quickly becomes a primary group relationship.

C．Sociologists believe that only primary group relationships are important to society.

D．Even in secondary groups, frequent communication serves to bring people into close relationships.

3. The phrase “size up” in paragraph 5 is closest in meaning to “________”.

A．enlarge	B．evaluate
C．impress	D．accept

4. This passage is developed primarily by ________.

A．drawing comparisons between theory and practice

B．presenting two opposing theories

C．defining important concepts

D．discussing causes and their effects