第1篇:Role of Play in Development
Play is easier to define with examples than withconcepts. In any case, in animals it consists ofleaping, running, climbing, throwing, wrestling, andother movements, either along, with objects, or withother animals. Depending on the species, play may be primarily for social interaction,exercise, or exploration. One of the problems in providing a clear definition of play is that itinvolves the same behaviors that take place in other circumstance—dominance, predation,competition, and real fighting. Thus, whether play occurs or not depends on the intention ofthe animals, and the intentions are not always clear from behaviors alone.
Play appears to be a developmental characteristic of animals with fairly sophisticatednervous systems, mainly birds and mammals. Play has been studied most extensively inprimates and canids (dogs). Exactly why animals play is still a matter debated in the researchliterature, and the reasons may not be the same for every species that plays. Determining thefunctions of play is difficult because the functions may be long-term, with beneficial effects notshowing up until the animal's adulthood.
Play is not without considerable costs to the individual animal. Play is usually very active,involving movement in space and, at times, noisemaking. Therefore, it results in the loss offuel or energy that might better be used for growth or for building up fat stores in a younganimal. Another potential cost of this activity is greater exposure to predators since play isattention-getting behavior. Great activities also increase the risk of injury in slipping or falling.
The benefits of play must outweigh costs, or play would not have evolved, according toDarwin' s theory. Some of the potential benefits relate directly to the healthy development ofthe brain and nervous system. In one research study, two groups of young rats were raisedunder different conditions. One group developed in an "enriched" environment, which allowedthe rats to interact with other rats, play with toys, and receive maze training. The other grouplived in an "impoverished" environment in individual cages in a dimly lit room with littlestimulation. At the end of the experiments, the results showed that the actual weight of thebrains of the impoverished rats was less than that of those raised in the enriched environment(though they were fed the same diets). Other studies have shown that greater stimulation notonly affects the size of the brain but also increase the number of connections between the nervecells. Thus, active play may provide necessary stimulation to the growth of synapticconnections in the brain, especially the cerebellum, which is responsible for motor functioningand movements.
Play also stimulates the development of the muscle tissues themselves and may providethe opportunities to practice those movements needed for survival. Prey species, like youngdeer or goats, for example, typically play by performing sudden flight movements and turns,whereas predator species, such as cats, practice stalking, pouncing, and biting.
Play allows a young animal to explore its environment and practice skill in comparativesafety since the surrounding adults generally do not expect the young to deal with threats orpredators. Play can also provide practice in social behaviors needed for courtship and mating.Learning appropriate social behaviors is especially important for species that live in groups,like young monkeys that needed to learn to control selfishness and aggression and tounderstand the give-and-take involved in social groups. They need to learn how to bedominant and submissive because each monkey might have to play either role in the future.Most of these things are learned in the long developmental periods that primates have, duringwhich they engage in countless play experiences with their peers.
There is a danger, of course, that play may be misinterpreted or not recognized as play byothers, potentially leading to aggression. This is especially true when play consists ofpracticing normal aggressive or predator behaviors. Thus, many species have evolved clearsignals to delineate playfulness. Dogs, for example, will wag their tails, get down their frontlegs, and stick their behinds in the air to indicate "what follows is just for play."
1.According to paragraph 1, why is playdifficult to define?
A.Play must be defined with concepts, not examples.
B.Play behavior often looks like nonplay behavior.
C.Play often occurs in the presence of animals that are not playing.
D.Play occurs independently of an animal's intentions.
2.According to paragraph 2, which of the following presents a particular challenge toresearchers who study play behavior in animals
A.The delay between activities and the benefits the animal derives from them.
B.The difficulty in determining which animal species play and which do not.
C.The fact that for most animals, there is no clear transition from youth to full adulthood.
D.The lack of research on the play behavior of animals other than canids and primates.
3.The word "considerable" in the passage paragraph 3 is closest in the meaning to
4.According to paragraph 3, each of the following is a cost to animals that engage inplay EXCEPT
A.exposure to predators.
B.a buildup of fat stores.
C.a loss of fuel that could be used for growth.
D.risk of injury from slipping or falling.
4.从Therefore开始后面的都是potential cost。三种cost已经用红色字体标出。B选项看似提到了，但是原文是说失去了fat store的机会，而不是因为play而build up了。所以B错。
5.Why does the author include the comment "though they were fed the same diets"?
A.To show why rats living in impoverished environments need less food than those living inenriched environments.
B.To eliminate the possibility that differences in diet were responsibly for observed differencesin brain weight.
C.To emphasize the point that rats were fed only the amount of food needed to keep themalive.
D.To suggest that rats fed the same diet have smaller brains than those fed a varied food.
5.这里提到的试验的结果。前面从in one research of study开始描述这个试验，提到了两个对比组，underdifferent conditions。后面是在说结果，括号里面的内容是对结论的解释说明。A,C,D三个选项一点儿都不沾边。只要高中学过一点数理化就知道这个是控制变量的试验，所以答案选B。
6.Paragraph 4 supports which of the following statements about an animal's brain.
A.The heavier the brain, the richer the environment in which the animal was raised.
B.The younger the animal, the harder it is to develop new connections between nerve cells.
C.The larger the animal, the harder it is to develop new connections between nerve cells.
D.The larger the animal's cerebellum, the larger will be the animal's nerve cells.
6.原文中从other studies 开始有描述了另外的观点。说greater stimulation不仅会影响大脑的大小，也会增加神经细胞间的连接的数量，而这个stimulation是由active play提供的。根据上文，环境越复杂，activeplay就越多，因此stimulation就越多，导致动物的大脑更大，也就更重。所以A选项符合这个观点。BCD都没提到。
7.According to paragraph 5, why might play behavior of prey species be differentfrom those of predator species?
A.Unlike predator species, prey species use play to prevent inappropriate socialbehaviors, such as biting.
B.Some prey species are physically incapable of certain types of predator movements.
C.The survival of each species type is linked to particular sets of muscular movements.
D.Predator species have more opportunities to practice play behaviors than prey species.
7.这道题的关键词在于needed for survival。因为prey species和predator species对于survival的要求不同，所以导致他们play behavior也不同。所以选C。 A，B，D原文都没提到。
8.The word "comparative" in the passage paragraph 6 is closest in meaning to
9.Which of the sentences below best expresses the essential information inthehighlighted sentence in the passage paragraph 6 ? Incorrect choices change themeaning in important ways or leave out essential information.
A.Only monkeys that have learned to control their selfish and aggressive behaviors can beinvolved in social groups.
B.Selfish and aggressive animals like monkeys live in groups in order to practice appropriatesocial behaviors.
C.Monkeys and other social animals need to learn behaviors appropriate for their socialgroups.
D.Some monkeys are naturally too selfish and aggressive to understand the give-and-take ofsocial groups, so they learn such important behaviors while young.
9.这道题中的原句主干是learning social behavior is important，特别是对于群居的动物。然后用了monkey做例证。A选项只提到了monkeys要控制自己才能融入群体，但没提到主干部分。 B选项说自私和攻击性强的动物药学social behavior，这就把其他动物排除在外了，改变了原句的意思。C正确，不仅提到了monkey也说到了其他的social animals(which means species that live in groups)为了融入群体要学social behavior。 D是错误选项，原文并没说猴子太自私以至于不能理解give and take…与原文矛盾，不选。
10.What can be inferred from paragraph 6 about the role of adults in play activities ofthe young?
A.Adults help their young learn to become dominant within the social group.
B.Young animals learn how to play from the adults within their social group.
C.Adults allow the young to engage in play behaviors within a protected, sage environment.
D.The long developmental period of some animals allows adults more time to teach their younghow to deal with the threats of predators.
10.根据young & adult定位到第六段第一句。说成年动物要让年轻的动物在相对安全的环境下玩儿。 因此可以得到答案C正确。A原文没有说让young去学怎么dominant，B原文虽然提到social group 但没提到是从adults身上学习。D原文完全没有相关描写。
11.The word "potentially" in the passage paragraph 7 is closest in meaning to
11.potentially潜在地。A市毫无疑问地; B是可能地;C是不幸地;D是快速地。前半句中有May be，表达了一中可能性，后半句没有转折，应该是接上上半句往下说的。所以意思应该想近。
12.According to paragraph 7, how do some animals ensure that other animalsunderstand that they are just playing?
A.By playing only with animals who are not predator.
B.By avoiding any aspects of the play behavior that are dangerous.
C.By practicing non-aggressive and non-predatory behaviors.
D.By using a set of signals that occurs only in play.
12.这一段前半部分一直在描述说有动物之间会误以为是真的aggression，中间出现了thus证明后面会说解决的方法。这里说解决方法是用clear signals 去表达playfulness。所以答案是D。
13. Look at the four squares [■] that indicate where the following sentence can beadded to the passage. Where would the sentence best fit? With messages such asthose, even dogs that are strangers to each other can be playing within a fewminutes.
There is a danger, of course, that play may be misinterpreted or not recognized as play byothers, potentially leading to aggression. ■【A】This is especially true when play consists ofpracticing normal aggressive or predator behaviors. ■【B】Thus,many species have evolvedclear signals to delineate playfulness. ■【C】Dogs, forexample, will wag their tails, get downtheir front legs, and stick their behinds in the air to indicate "what follows is just for play." ■【D】
13.要插入的句子开头为With message such as those，那么说明前面肯定会描述一些messages，后面又说even dogs，那证明前面应该也提到了狗的行为。所以这里应该插在最后一个空里。
14. Directions: an introductory sentence for a brief summary of the passage isprovided below. Complete the summary be selecting the THREE answer choices thatexpress the most important ideas in the passage. Some sentences do not belong inthe summary because they express ideas that are not presented in the passage or areminor ideas in the passage. This question is worth 2 points.
Play appears to be a developmental characteristic of animals with fairly sophisticated nervoussystems, mainly birds and mammals.
A.Although play often resembles aggression, flight, or other purposeful activities, researchersdo not degree on the reasons for and functions of play
B.Although many animals develop physically from play, too many young animals becomevictims of their natural predators while playing.
C.Animals such as rats, dogs, deer, goats and monkeys learn how to be both dominant andsubmissive during play activities so that they will fit in better with their adult social groups.
D.The function of play is still debated in the research literature primarily because each animalspecies uses so few of the many available types of play behavior.
E.Energy expenditure and security risks are some of the costs to animals of play behavior, butthe costs are not so great that they outweigh the long-term benefits of play to the species.
F.As experiments and observations have shown, animals that play at some stages of theirdevelopment obtain neurological, muscular, or social benefits from the play behaviors.
14.选项A对应在原文第一段，提到play的行为包括了running，climbing，fighting等等aggression的行为，但是很难确定其function所以A正确。E对应原文第三段，potential cost提到了loss ofenergy，security risks等等，但是第一段也提到说play是long-term beneficial的，第四段开头说好处一定会outweigh其costs。B这个原文没有提到，虽然第三段提到了potential cost，后面也说adults通常会让young在相对安全的情况下play，但并没有说太多太多的小动物变成了victims。不选。C这个原文虽然说他们要学social behavior，但没提到说这类动物要学着去dominant，不选。D选项对应原文第一段，但选项中的原因和原文不符，不选。E对应原文第三段，potential cost提到了loss of energy，security risks等等，但是第一段也提到说play是long-term beneficial的，第四段开头说好处一定会outweigh其costs。F选项对应原文第四，五段。第四段说play会影响大脑发育，神经细胞间连接的数量。第五段说到了有益于muscletissue的发育。后文第六段也提到了social Benefits。
托福阅读TPO30第2篇:The Pace of Evolutionary Change
A heated debate has enlivened recent studiesof evolution. Darwin's original thesis, and theviewpoint supported by evolutionary gradualists, isthat species change continuously but slowly and insmall increments. Such changes are all but invisible over the short time scale of modernobservations, and, it is argued, they are usually obscured by innumerable gaps in theimperfect fossil record. Gradualism, with its stress on the slow pace of change, is a comfortingposition, repeated over and over again in generations of textbooks. By the early twentiethcentury, the question about the rate of evolution had been answered in favor of gradualism tomost biologists' satisfaction.
Sometimes a closed question must be reopened as new evidence or new arguments basedon old evidence come to light. In 1972 paleontologist Stephen Jay Gould and Niles Eldredgechallenged conventional wisdom with an opposing viewpoint, the punctuated equilibriumhypothesis, which posits that species give rise to new species in relatively sudden bursts,without a lengthy transition period. These episodes of rapid evolution are separated byrelatively long static spans during which a species may hardly change at all.
有时，已经有了结论的问题必须由在已有证据基础上出现的新的证据和新的论点使其重新展开讨论。在1972年，古生物学者Stephen Jay Gould和 Niles Eldredge用相反的论点挑战了世俗的结论，即断点平衡说，它假设了物种演变为新的物种是通过相对突然的爆发，并非通过长时间的过渡时期。迅速的进化期被时间相对更长的静态期分开，而在静态时期，物种是几乎完全不变的。
The punctuated equilibrium hypothesis attempts to explain a curious feature of thefossil record—one that has been familiar to paleontologist for more than a century but hasusually been ignored. Many species appear to remain unchanged in the fossil record for millionsof years—a situation that seems to be at odds with Darwin's model of continuous change.Intermediated fossil forms, predicted by gradualism, are typically lacking. In most localities agiven species of clam or coral persists essentially unchanged throughout a thick formationof rock, only to be replaced suddenly by a new and different species.
The evolution of North American horse, which was once presented as a classic textbookexample of gradual evolution, is now providing equally compelling evidence for punctuatedequilibrium. A convincing 50-million-year sequence of modern horse ancestors—eachslightly larger, with more complex teeth, a longer face, and a more prominent central toe—seemed to provide strong support for Darwin's contention that species evolve gradually.But close examination of those fossil deposits now reveals a somewhat different story. Horsesevolved in discrete steps, each of which persisted almost unchanged for millions of years andwas eventually replaced by a distinctive newer model. The four-toed Eohippus preceded thethree-toed Miohippus, for example, but North American fossil evidence suggests a jerky,uneven transition between the two. If evolution had been a continuous, gradual process,one might expect that almost every fossil specimen would be slightly different from every year.
If it seems difficult to conceive how major changes could occur rapidly, consider this: analteration of a single gene in files is enough to turn a normal fly with a single pair of wings intoone that has two pairs of wings.
The question about the rate of evolution must now be turned around: does evolutionever proceed gradually, or does it always occur in short bursts? Detailed field studies of thickrock formations containing fossils provide the best potential tests of the competing theories.
Occasionally, a sequence of fossil-rich layers of rock permits a comprehensive look atone type of organism over a long period of time. For example, Peter Sheldon's studies oftrilobites, a now extinct marine animal with a segmented body, offer a detailed glimpse intothree million years of evolution in one marine environment. In that study, each of eightdifferent trilobite species was observed to undergo a gradual change in the number ofsegments—typically an increase of one or two segments over the whole time interval. Nosignificant discontinuous were observed, leading Sheldon to conclude that environmentalconditions were quite stable during the period he examined.
Similar exhaustive studies are required for many different kinds of organisms from manydifferent periods. Most researchers expect to find that both modes of transition from onespecies to another are at work in evolution. Slow, continuous change may be the normduring periods of environmental stability, while rapid evolution of new species occurs duringperiods of environment stress. But a lot more studies like Sheldon's are needed before we cansay for sure.
1.The word "innumerable" in the passage isclosest in the meaning to
2.According to paragraph 1, all of the following are true EXCEPT
A.Darwin saw evolutionary change as happening slowly and gradually.
B.Gaps in the fossil record were used to explain why it is difficult to see continuous smallchanges in the evolution of species.
C.Darwin's evolutionary thesis was rejected because small changes could not be observed inthe evolutionary record.
D.By the early twentieth century, most biologists believed that gradualism explainedevolutionary change.
3.Which of the sentences below best expresses the essential information in thehighlighted sentence in the passage paragraph 2 ? Incorrect choices change themeaning in important ways or leave out essential information.
A.The punctuated equilibrium hypothesis challenged gradualism, which holds that speciesevolve in relatively sudden bursts of brief duration.
B.The punctuated equilibrium hypothesis developed by Stephen Jay Gould and NilesEldredge was challenged in 1972.C.In 1972 Stephen Jay Gould and Niles Eldredge challengedgradualism by positing that change from one species to another cannot occur without alengthy transition period.
D.The punctuate equilibrium hypothesis, in opposition to gradualism, holds that transitionsfrom one species to another occur in comparatively sudden burst.
4.According to paragraph 1 and paragraph 2, the punctuated equilibrium hypothesisand the gradualism hypothesis differed about
A.Whether the fossil record is complete.
B.Whether all species undergo change.
C.Whether evolution proceeds an a constant rate.
D.How many new species occur over long periods of time.
5.According to paragraph 3, the lack of intermediate fossils in the fossil record ofsome species
A.has been extensively studied by paleontologist for over a century.
B.contradicts the idea that most species have remained unchanged for millions of years.
C.challenges the view that evolutionary change is gradual.
D.is most common in the fossil records of clam and coral species.
5.根据lack of intermediate fossils定位到第三段倒数第二句，在往前看一句说，这一情况对于达尔文学说是不和的，而达尔文学说正是渐进论，这一段的最后也说原来的物种突然被替换，而不是渐渐进化改变的。所以C符合原文意思。 A与原文第一句破折号后矛盾，原文说这一现象一直被Ignored，B选项原文矛盾，该现象应该是反对了达尔文学说，支持了物种有长期不改变的论点。D虽然正确但是只是本段的细节，不能表达主题，所以不选。
6.The word "compelling" in the passage paragraph 4 is closest in the meaning to
6.Compel本身是强迫，此处作为evidence的形容词可以延伸为说服力强的。因此答案选B 有说服力的。A是惊奇的，C是有争议的，D是细节的。都不沾边。另外通过句义可以判断，前文说马的进化was once 是经典的渐进论的证明，is now(轻微转折)提了"equally"怎么样的证据证明了点断平衡论，前文既然说对gradualevolution很支持，那么后文出现equally，那应该对点断论也是有力证据。因此选B。
7.Paragraph 4 mentions that North American horses have changed in all the followingways EXCEPT in
A.the number of toes they have.
B.the length of their face.
C.their overall size.
D.the number of years they live.
8.The word "alteration" in the passage paragraph 5 is closest in meaning to
9.According to paragraph 7, Peter Sheldon's studies demonstrated which ofthefollowing about trilobites?
A.They underwent gradual change over a long time period.
B.They experienced a number of discontinuous transitions during their history.
C.They remained unchanged during a long period of environmental stability.
D.They evolved in ways that cannot be counted for by either of the two competing theories.
9.根据Peter Sheldon定位到原文第二句。后面对trilobites进行了描述，A选项对应了原文第三句，后文又继续说没有明显的断点。所以A正确。 B与原文第四句冲突。C与第三句冲突，D原文没有这种说法。而且上文也表明它符合gradual evolvement。
10.The word "occasionally" in the passage paragraph 7 is closest in meaning to
C.once in a while.
D.to some extent.
11.The main purpose of paragraph 7 is to
A.Describe one test of the competing theories.
B.Provide an example of punctuated equilibrium.
C.Describe how segmented animals evidence both competing theories.
D.Explain why trilobites became extinct.
12. Look at the four squares [■] that indicate where the following sentence can beadded to the passage.Where could the sentence best fit? They believe thatenvironmental conditions may play a crucial role in determining which of the twomodes will be in operation over a given period.
■【A】Similar exhaustive studies are required for many different kinds of organisms frommany different periods. ■【B】Most researchers expect to find that both modes of transitionfrom one species to another are at work in evolution.■【C】Slow, continuous change may bethe norm during periods of environmental stability, while rapid evolution of new speciesoccurs during periods of environment stress. ■【D】But a lot more studies like Sheldon's areneeded before we can say for sure.
13.Directions: selected from the seven phrases below the phrases that correctlycharacterize punctuated equilibrium and the phrases that correctly characterizegradualism. Two of the phrases will not be used. This question is worth 3 points.
A.States that new species emerge from existing species during relatively brief period of time.
B.Was first formulated by Charles Darwin.
C.Explain why North American horses have become smaller over time.
D.States that new species evolve slowly and continuously from existing species.
E.Explain the lack of intermediate fossil forms in the fossil record of many species.
F.Competition is usually strongest when the density of the competing populations is the same.
G.States that a species will not change unless its environment changes.
A B C D E F G
A B C D E F G
托福阅读TPO30第3篇:The Invention of the Mechanical Clock
In Europe, before the introduction of themechanical clock, people told time by sun (using,for example, shadow sticks or sun dials) and waterclocks. Sun clocks worked, of course, only on cleardays; water clocks misbehaved when the temperature fell toward freezing, to say nothing oflong-run drift as the result of sedimentation and clogging. Both these devices worked well insunny climates; but in northern Europe the sun may be hidden by clouds for weeks at a time,while temperatures vary not only seasonally but from day to night.
Medieval Europe gave new importance to reliable time. The Catholic Church had its sevendaily prayers, one of which was at night, requiring an alarm arrangement to waken monksbefore dawn. And then the new cities and towns, squeezed by their walls, had to know andorder time in order to organize collective activity and ration space. They set a time to go tosleep. All this was compatible with older devices so long as there was only one authoritativetimekeeper; but with urban growth and the multiplication of time signals, discrepancy broughtdiscord and strife. Society needed a more dependable instrument of time measurementand found it in the mechanical clock.
We do not know who invented this machine, or where. It seems to have appeared in Italyand England (perhaps simultaneous invention) between 1275 and 1300. Once known, itspread rapidly, driving out water clocks but not solar dials, which were needed to check thenew machines against the timekeeper of last resort. These early versions were rudimentary,inaccurate, and prone to breakdown.
Ironically, the new machine tended to undermine Catholic Church authority. Althoughchurch ritual had sustained an interest in timekeeping throughout the centuries of urbancollapse that followed the fall of Rome, church time was nature’s time. Day and night weredivided into the same number of parts, so that except at the equinoxes, days and night hourswere unequal; and then of course the length of these hours varied with the seasons. But themechanical clock kept equal hours, and this implied a new time reckoning. The CatholicChurch resisted, not coming over to the new hours for about a century. From the start,however, the towns and cities took equal hours as their standard, and the public clocks installedin town halls and market squares became the very symbol of a new, secular municipalauthority. Every town wanted one; conquerors seized them as especially precious spoils ofwar; tourists came to see and hear these machines the way they made pilgrimages to sacredrelics.
The clock was the greatest achievement of medieval mechanical ingenuity. Its generalaccuracy could be checked against easily observed phenomena, like the rising and setting ofthe sun. The result was relentless pressure to improve technique and design. At every stage,clockmakers led the way to accuracy and precision; they became masters of miniaturization,detectors and correctors of error, searchers for new and better. They were thus the pioneers ofmechanical engineering and served as examples and teachers to other branches ofengineering.
The clock brought order and control, both collective and personal. Its public display andprivate possession laid the basis for temporal autonomy: people could now coordinatecomings and goings without dictation from above. The clock provided the punctuation marksfor group activity, while enabling individuals to order their own work (and that of others) so asto enhance productivity. Indeed, the very notion of productivity is a by-product of the clock:once one can relate performance to uniform time units, work is never the same. One movesfrom the task-oriented time consciousness of the peasant (working on job after another, astime and light permit) and the time-filling busyness of the domestic servant (who always hadsomething to do) to an effort to maximize product per unit of time.
1.Why does the author provide the informationthat "in northern Europe the sun may be hiddenby clouds for weeks at a time, whiletemperatures vary not only seasonally but fromday to night"?
A.To emphasize the variety of environments in which people used sun and water clocks to telltime.
B.To illustrate the disadvantage of sun and water clocks.
C.To provide an example of an area where water clocks have an advantage over sun clocks.
D.To counter the claim that sun and water clocks were used all over Europe.
2.According to paragraph 2, all of the following are examples of the importance oftimekeeping to medieval European society EXCEPT
A.the need of different towns to coordinate timekeeping with each other.
B.the setting of specific times for the opening and closing of markets.
C.the setting of specific time for the start and finish of the working day.
D.the regulation of the performance of daily church rituals.
2.虽然原文提到说城与城之间要保持一直，但其目的是organize collective activity，和ration space。 而collective activity对应了选项B，C对应set time to go to sleep,也就是结束工作的时间。D对应开头catholic church的prayers活动。
3.According to paragraph 2, why did the medieval church need an alarmarrangement?
A.The alarm warned the monks of discord or strife in the town.
B.The church was responsible for regulating working hours and market hours.
C.The alarm was needed in case fires were not put out each night.
D.One of the church's daily rituals occurred during the night.
3.对应原文的第二句话，可根据alarm arrangement定位，前文说one of which was at night，后面说towaken monk before dawn，这两个都可以算是原因，选项中符合的只有D。
4.The word "authoritative" in the passage(paragraph 2)is closest in meaning to
4.authoritative是权威的，A是真实的，B是重要的，C是官方的，D是有效的。因此C是正确的。文章中也说only one怎样的time keeper，所以应该是官方准确时间。
5.The author uses the phrase "the timekeeper of last resort" to refer to
5.前文说需要它去check 这个machines，which前面说的是solar dials所以指的是the sun。
6.The word "rudimentary" in the passage(paragraph 3)is closest in meaning to
7.According to paragraph 4, how did the Catholic Church react to the introduction ofmechanical clocks?
A.Its used mechanical clocks through the period of urban collapse.
B.It used clocks to better understand natural phenomena, like equinoxes.
C.It tried to preserve its own method of keeping time, which was different from mechanical-clock time.
D.It used mechanical clocks to challenge secular, town authorities.
7.可定位至相关段落，关键词为resisted，not coming over，所以证明church在拒绝新的计时方法，也就是在试着保护自己的方法。
8.The word "installed" in the passage(paragraph 4)is closest in meaning to
B.expected by the majority of people.
D.put in place.
9.It can be inferred from paragraph 5 that medieval clockmakers
A.were able to continually make improvements in the accuracy of mechanical clocks.
B.were sometimes not well respected by other engineers.
C.sometimes made claims about the accuracy of mechanical clocks that were not true.
D.rarely shared their expertise with other engineers.
10.Paragraph 5 answers which of the following questions about mechanical clocks.
A.How did early mechanical clocks work?
B.Why did the design of mechanical clocks affect engineering in general?
C.How were mechanical clocks made?
D.What influenced the design of the first mechanical clock?
11.The word "pioneers" in the passage isclosest in meaning to
12.According to paragraph 6, how did the mechanical clock affect labor?
A.It encouraged workers to do more time-filling busywork.
B.It enabled workers to be more task oriented.
C.It pushed workers to work more hours every day.
D.It led to a focus on productivity.
12.定位到原文最后一句，说使人们从task-oriented和 time-filling busyness的模式变为maximizeproduct per unit of time，从而提高了productivity，所以选择D。A，B原文都提到了，但是是转化前的状态，C没提到。
13. Look at the four squares[■] that indicate where the following sentence can beadded to the passage. Where would the sentence best fit? The division of time nolonger reflected the organization of religious ritual.
Ironically, the new machine tended to undermine Catholic Church authority. Although churchritual had sustained an interest in timekeeping throughout the centuries of urban collapsethat followed the fall of Rome,church time was nature's time.■【A】Day and night were dividedinto the same number of parts, so that except at the equinoxes, days and night hours wereunequal;and then of course the length of these hours varied with the seasons.■【B】But themechanical clock kept equal hours, and this implied a new time reckoning.■【C】The CatholicChurch resisted, not coming over to the new hours for about acentury.■【D】From the start,however, the towns and cities took equal hours as their standard, and the public clocks installedin town halls and market squares became the very symbol of a new, secular municipalauthority. Every town wanted one; conquerors seized them as especially precious spoils ofwar;tourists came to see and hear these machines the way they made pilgrimages to sacredrelics.
13.原句中no longer反应宗教仪式了，那么此句前后应该有对现在的计时制度的描写，另外句末提到了religious ritual，所以附近也应该有对宗教组织的态度描写，满足这两个条件的位置是C。
14. Directions: An introductory sentence for a brief summary of the passage isprovided below. Complete the summary by selecting the THREE answer choices thatexpress the most important ideas in the passage. Some sentences do not belong inthe summary because they express ideas that are not presented in the passage or areminor ideas in the passage. This question is worth 2 points.
The introduction of the mechanical clock caused important changes to the society of medievalEurope.
A.The increasing complexity of social and economic activity in medieval Europe led to theneed for a more dependable means of keeping time than sun and water clocks provided.
B.Because they were unreliable even in sunny climates, sun clocks and water clocks were rarelyused in Europe, even before the invention of the mechanical clock.
C.Before the mechanical clock, every city wanted a large number of timekeepers because moretimekeepers allowed for better organization of collective activities.
D.Soon after the invention of mechanical clocks, sun and water clocks became obsoletebecause mechanical clocks were far more accurate.
E.Predators help maintain biological diversity by limiting populations of a dominantcompetitor species, thereby preventing that species from excluding others.
F.The removal of sea stars reduces the diversity of the community in which they arepredators, and is therefore a bad idea.
14.A对应第二段倒数第一句和倒数第二句后半句"with urban growth and the multiplication of timesignals, discrepancy brought discord and strife. Society needed a more dependableinstrument of time measurement and found it in the mechanical clock."正确。B与原文第一段矛盾。不选。C原文并没有提到说有大量的timekeepers，而第三段还说只能有一个权威的timekeeper不选。D对应原文第三段，说应用mechanical clock之后water clock很快被弃用了，但sun clock依然留下用来对照mechanical clock的准确性，错，不选。