19．With the teacher'spermission（许可）the students went outside to play games．
18．Mark Twain was ahumourous（幽默的）writer and hi works always make readers laugh．
17．Electrical devices（仪器）could soon use power made by human energy．Scientists say they have developed an experimental device that produces electricity from the physical movement of a person walking，British scientist Max Donelan and other scientists in Canada and the United States developed the device．
The device connects to a person's knee．As the person walks，the device captures energy each time the person slows down．To do this，the device helps with the slowing down movement of the leg，the movements of the walking person push parts of a small machine that produces electricity．Using the device，an adult walking quickly could produce thirteen watts of electricity in just a minute．Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes．
There are several possible uses for the device．Developers say it could help people who work in areas without electricity to operate small computers．The device could also he used in hospitals to operate heart pacemakers，it could even be used to assist in the movement of robotic arms and legs．
The experimental version of the device weighs about one and a half kilograms，but it is too costly for most people to buy，but the researchers hope to make a lighter，less costly version，An improved version should be ready in one year．
The developers hope the device will one day help developing countries； nearly twenty five prcent of people around the world live without electric power．
A similar product was invented in 2005by Larry Rome of the University of Pennsylvania，He created a bag carried on a person's back that also produces power from walking．The knee device does not produce as much electricity as the bag，but the bag requires the walker to carry a load of twenty to thirty kilograms．
32．The second paragraph mainly talks aboutB
A．who developed the device
B．how the device works
C．several possible uses for the devices
D．how much electricity the device can produce
33．What is the disadvantage of the experimental version of the device？C
A．It is too heavy for the walker to bear
B．It is too complex for people to use
C．It is too expensive for most people to afford              
D．It will slow down one's walking speed
34．Compared with the device designed by Larry Rome，this new deviceA
A．produces power without adding more loads to the walker
B．can produce more power in a much shorter time
C．needs to be equipped with a battery        
D．can help the walker walk faster
35．What would be the best title for the passage？C
A．First device powered by walking will soon be on the market
B．Advanced technology brings in a new way to operate heart pacemakers
C．Device gives new meaning to the idea of power walking
D Human energy will become a main source of electricity．
16．Americans use many expressions with the word dog．People in the United States love their dogs and treat them well．They take their dogs for walks，let them play outside and give them good food and medical care．However，dogs without owners to care for them lead a different kind of life．The expression，to lead a dog's life，describes a person who has an unhappy life．
Some people say we live in a dog-eat-dog world．That means many people are competing for the same things，like good jobs．They say that to be successful，a person has to work like a dog．This means they have to work very，very hard．Such hard work can make people dog-tired．And，the situation would be even worse if they became sick as a dog．
Still，people say every dog has its day．This means that every person enjoys a successful period during his or her life．To be successful，people often have to learn new skills．Yet，some people say that you can never teach an old dog new tricks．They believe that older people do not like to learn new things and will not change the way they do things．
Some people are compared to dogs in bad ways．People who are unkind or uncaring can be described as meaner than a junkyard dog．Junkyard dogs live in places where people throw away things they do not want．But mean dogs are often used to guard this property．They bark or attack people who try to enter the property．However，sometimes a person who appears to be mean and threatening is really not so bad．We say his bark is worse than his bite．
Dog expressions also are used to describe the weather．The dog days of summer are the hottest days of the year．A rainstorm may cool the weather．But we do not want it to rain too hard．We do not want it to rain cats and dogs．
28．A person who lives an unhappy life can be described as"B"．
A．becoming sick as a dog 
B．leading a dog's life  
C．living in a dog-eat-dog world  
D．Working like a dog
29．The underlined word"mean in Paragraph 4most probably means"C"．
A．wild        
B．selfish          
C．violent        
D．Poor
30．What can we learn from the text？D
A．Everyone can be successful if he learns from the old．
B．It might be difficult for the young to learn new skills．
C．Junkyard dogs are careful in money arrangement．
D．Fierce persons aren't so awful as their appearance sometimes．
31．To support his idea，the author develops the text mainly byC．
A．listing reasons    
B．using idioms  
C．giving examples    
D．Making comparisons．
15．It can be rude to talk politics over dinner…explicitly at least．But subtle linguistic cues might reveal more than you think about your political views，whether at the dinner table-or on Twitter．"There's a lot of information in the details of our language．"Matthew Purver，a computational linguist at Queen Mary University of London．"The little words we use，the way we join together our sentences，and the kind of interactional patterns，where we react to other people．"
Purver's research team used Twitter as their communications forum，randomly selecting 28，000 users，half of whom clearly followed one political party's Twitter feeds，for example，@GOP，but not the other，for a more or less even split among Republicans and Democrats．Then they analyzed the words in those users'timelines during a two-week period in June 2014．
As you might expect，the tweets of users who followed Republican accounts were a lot more likely to contain words like"obamacare"and"benghazi，"whereas"bridge gate"came up more among Democratic followers．
But the researchers also found that the left-leaners were much more likely to use words like sh#& and fu@$ than were the righties．And whereas Republican followers preferred plural pronouns like"we"or"us，"Democratic followers used more singular pronouns，like"I"or"me．"．
That pronoun use could reflect previous work on how people on the right and left forge their political views．"People on the right end of the political spectrum are more likely to be concerned with group conformity．Whereas people who tend to be on the left are perhaps more likely to see their morals or their values deriving from individualistic ideas，if you like．"The study is in the journal PLoS ONE．
Of course，just following a political account is not proof of political belief．But these findings suggest that algorithms may increasingly be able to read between the lines，detecting nuances in human communication that even we humans can't perceive．
 
29．What is the meaning of"There's a lot of information in the details of our language．"？A
A．Information can be conveyed through the way of word combination，sentence pattern，etc．explicitly or implicitly．
 B．We convey our meaning directly through language．
C．People say what they want．
D．Language is the only way we convey our meaning．
30．What result does Purver's research team find？C
A．Republican followers used more singular pronouns．
B．Democratic followers preferred plural pronouns like"we"or"us"．
C．Republican followers are more likely to be concerned with group conformity．
D．Democratic followers did not care about government issues because they value individuality
31．What preference can pronoun use reflect？B
A．That pronoun use could not reflect people's political views．
B．Democratic followers are more likely to see their morals or their values deriving from individualistic ideas．
C．Either Democratic or Republican followers choose the pronouns at random．
D．Republican followers'political views are on the left because they like to use the word conformity．
32．Which of the following is true？C
A．It's right to talk about politics over dinner．
B．People use Twitter to express their political views explicitly．
C．Humans may not perceive what we convey through language．
D．Linguistics has nothing to do with algorithms．
14．Etymology，the study of words and word roots，may sound like the kind of thing done by boring librarians in small，dusty rooms．Yet etymologists actually have a uniquely interesting job．They are in many ways just like archaeologists （考古学家） digging up the physical history of people and events．The special aspect of etymology is that it digs up history，so to speak，through the words and phrases that are left behind．
The English language，in particular，is a great field to explore history through words．As a language，English has an extraordinary number of words．This is partly due to its ability to adapt foreign words so readily．For example，"English"words such as kindergarten （from German），croissant （from French），and cheetah （from Hindi） have become part of the language with little or no change from their original sounds and spellings．So English-language etymologists have a vast world of words to explore．
Another enjoyable thing about etymology for most word experts is solving word mysteries （谜）．No，etymologists do not go around solving murders，like the great detective Sherlock Holmes．What these word experts solve are mysterious origins of some of our most common words．
One of the biggest questions English language experts have pursued is how English came to have the phrase OK．Though it is one of the most commonly used expressions，its exact beginning is a puzzle even to this day．Even its spelling is not entirely consistent--unless you spell it Okay，it is hard even to call it a word．
Etymologists have been able to narrow OK's origin down to a likely，although not certain，source （来源）．It became widely used around the time of Martin Van Buren's run for president in 1840．His nickname was Old Kinderhook．What troubles word experts about this explanation is that the phrase appeared in some newspapers before Van Buren became well known．It is likely that Van Buren could be called its primary source．Etymologists will doubtlessly keep searching for the original source．However，it is clear that OK's popularity and reputation have topped those of the American president to whom it has been most clearly linked．
21．The author mentions the words like"croissant"in Paragraph 2 to showC
A．words have changed a lot in the two languages
B．what English-language etymologists are exploring now
C．English has absorbed many words from other foreign languages
D．the English vocabulary is difficult to the non-English-speaking people
22．The underlined word"pursued"in Paragraph 4 meansB．
A．looked upon     
B．dug up    
C．put in        
D．set down
23．We can learn from the passage that etymologistsA．
A．discover the possible origin of words 
B．help detectives to solve mysterious murders
C．write interesting stories for some newspapers
D．explore the English language as well as the recent events
24．What most probably is the major purpose of the passage？C
A．To present the history of English words．
B．To explain what an etymologist does for his job．
C．To introduce the pleasure of the study of words and word roots．
D．To teach readers how to tell English words from non-English words•
13．假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文．文中共有10处错误，每句中最多有两处．错误涉及一个单词的增加、删除或修改．增加：在缺词处加一个漏词符号（^），并在其下面写出该加的词．删除：把多余的词用斜线（\）划掉． 修改：在错的词下画一横线，并在该词下面写出修改后的词．注意：1．每处错误及其修改均仅限一词； 2．只允许修改10处，多者（从第11处起）不计分．
A discussion about hiking had been held in our class．Some students think that hiking during vacations can make people feel healthier，fresher or more harmonious with the nature．They find themselves deep attracted by the beauty of nature．They can also be relaxing by walking in deep mountains．But nowadays some hikers even begin to explore the places people have ever been to，and accidents have happened now and then because a poor knowledge of hiking．Some hikers even lost their life．The other students in our class think it not safe to organize so dangerous activities．They make suggestions what laws should be passed and hikers should be trained before they attend the activities．
12．The beauty of confidence is that it is possible to learn it，no matter who you are!Follow these simple steps to be confident．
    Consider your strengths and success．（36）B．When have you helped others？What are you good at？When have you taken pride in yourself？What are you working hard for？If you have difficulty thinking of your strengths and success，ask your family members or a close friend．
    Have goals．Sitting around and doing nothing will make you feel worse．Start with a small goal．（37）EYou'll get more confidence achieving a small goal．Once you've achieved many smaller goals，you can set bigger goals．
    （38）G．Failure is the mother of success．When you fail，view it as a learning experience．Often we have to fail on our own to gain experience．By failing，you have at least taken a chance．
    Pick a role model．Pick a role model that is always confident and always learn from them．Study their action，their manners of speaking and how they communicate with others．（39）A．However，it's a great place to start．
    Smile．Confident people smile often，and without much reason．（40）D．It tells the people around you that you're comfortable in yourself and enjoying your time．

A．Of course you don't want to spend your entire life copying someone else．
B．If possible，write them down so that you can look back at them later．
C．Start projecting a more powerful you today．
D．Smiling is a friendly and open gesture．
E．Otherwise，you'll get discouraged．
F．After reaching a goal，reward yourself．
G．Learn from failure．
11．Most people have some common sense．When we see something suspicious on TV，in the newspaper，or on the Internet，we roll our eyes and wonder how anyone could believe something so stupid．Nevertheless，there are stories that even educated people still believe．These tales may or may not be true，but they leave us wondering whether they are real or not．On National Geographic Channel，these stories are dissected（剖析） in full detail in the series Is It Real．
Thousands of years ago，aliens landed on the Earth．They tampered （破坏） with the evolution of humans and the results of this can be seen practically everywhere．Sound ridiculous？Not to some people．Believe it or not，there are those who believe that alien astronauts had a hand in making the human race what it is today．Travel back in time with Ancient Astronauts and visit our"alien ancestors"．
In the autumn of 1888，Jack the Ripper roamed（漫游） the streets of London's East End．After his reign（统治） of terror was over，five women had been killed．To this day，the mystery of who killed these ladies remains unsolved．No one knows for sure，but the truth may be revealed on Jack the Ripper．
Vampires（吸血鬼）．Just the thought of these fictional beasts is enough to make your blood run cold．While we may think that they only come to life in books and movies，vampires are actually based on real people．Historians，folklorists，scientists and doctors all work together to investigate the plausibility（合理性） of vampires．Take a bite into this juicy mystery on Vampires．
No other channel can offer this type of programming other than National Geographic Channel．In this unique series，they've stripped away 12 myths that have stood the test of time to expose the truth and find out the answer to the question-Is it real？
29．What type of person would believe these stories？C
A．Those with a fear of ghosts．
B．Those without any common sense
C．Those including the educated         
D．Only educated people．
30．Who was Jack the Ripper？C
A．An infamous actor in London's East End theater district．
B．The name of a traveler to London's East End．
C．The name given to an unknown murderer．
D．The serial killer of hundreds of women in the 1800s．
31．The truth about Vampires may be known becauseB．
A．a novelist is looking into it
B．different people in different fields are weighing in with it
C．there's new evidence that can prove their existence
D．National Geographic Channel knows the truth
32．What is the purpose of this series？D
A．To uncover the details about a series of murders．
B．To solve well-known crimes．
C．To hide the truth about fairy tales．
D．To analyse stories that people believe．
10．Phil White has just returned from an 18，000-mile，around-the-world bicycle trip．White had two reasons for making this epic journey．First of all，he wanted to use the trip to raise money for charity，which he did．He raised￡70，000 for the British charity，Oxfam．White's second reason for making the trip was to break the world record and become the fastest person to cycle around the world．He is still waiting to find out if he has broken the record or not．
White set off from Trafalgar Square，in London，on 19th June 2004 and was back 299 days later．He spent more than l，300 hours in the saddle（车座） and destroyed four sets of tyres and three bike chains．He had the adventure of his life crossing Europe，the Middle East，India，Asia，Australia，New Zealand and the Americas．Amazingly，he did all of this with absolutely no support team．No jeep carrying food，water and medicine．No doctor．Nothing!Just a bike and a very，very long road．
 The journey was lonely and desperate at times．He also had to fight his way across deserts，through jungles and over mountains．He cycled through heavy rains and temperatures of up to 45 degrees，all to help people in need．There were other dangers along the road．In Iran，he was chased by armed robbers and was lucky to escape with his life and the little money he had．The worst thing that happened to him was having to cycle into a headwind on a road that crosses the south of Australia．For l，000 kilometers he battled against the wind that was constantly pushing him．This part of the trip was slow，hard work and depressing，but he made it in the end．Now Mr．White is back and intends to write a book about his adventures．
21．When Phil White returned from his trip，heB．
A．broke the world record               
B．collected money for Oxfam
C．destroyed several bikes              
D．travelled about 1 300 hours
22．What does the word"epic"in Paragraph l most probably mean？B
A．Very slow but exciting．
B．Very long and difficult．
C．Very smooth but tiring．
D．Very lonely and depressing．
23．During his journey around the world，Phil WhiteC．
A．fought heroically against robbers in Iran
B．experienced the extremes of heat and cold
C．managed to ride against the wind in Australia
D．had a team of people who travelled with him
24．Which of the following words can best describe Phil White？D
A．Imaginative．
B．Independent．
C．Modest．
D．Determined．
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