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            • 1．
              Talk to the animals
              All kinds of animals can communicate in one way or another． Maybe you have heard about the way bees dance around to send messages to each other and the ways dogs bark （犬吠） to give warnings or to be friendly． But did you know about infrasonic （次声的） communication
              used by elephants？ This is how it works：
              Humans hear low sounds like the thunder rumbling （隆隆作响） in the sky． But we don't hear sounds lower than that． However， animals such as elephants can hear much lower sounds than humans can． And what's more， they can make lower sounds as well， and they use them to communicate with each other． This is known as infrasound．
              The amazing thing about infrasound is that it travels over several kilometers． Sounds which have a higher pitch （音高）， like the ones people can hear， don't travel well through walls，
              leaves， trees， and so on， which is why we can't hear sounds from more than 100meters away． But infrasound is much "stronger"， and things like trees have no effect on it． Therefore it can travel much further． Elephants can hear infrasonic calls from 4kilometers away!
              There have been reports of people watching groups of elephants feeding or resting and then the elephants suddenly all stopped whatever they were doing for no reason at all． They obviously heard a warning call from a long way away， but the people didn't hear a sound． In places like a zoo or wildlife park where you can get nearer to animals， it is easier to sense when infrasonic sounds are made． When you stand near mother elephants with their babies in a zoo you may notice a slight rumbling in the air every few minutes - not loud or strong， but clearly noticeable． This is infrasonic communication - the mother elephants "talking" to their babies．

              (1) How do elephants communicate with each other？ ______
              A．By dancing around to send messages．
              B．By using infrasonic communication．
              C．By different sounds of rumbling．
              D．By different ways of barking．
              (2) What is the amazing thing about infrasound？ ______
              A．It goes into the sky．
              B． It travels very far．
              C． It sounds stronger．
              D． It stops at walls．
              (3) Humans can hear ______ ．
              A．sounds with a higher pitch
              B．sounds from 100meters away
              C．lower sounds than elephants can
              D．lower sounds than thunder rumbling
              (4) In places like zoos， ______ ．
              A．elephants don't need to make infrasonic sounds
              B．it is easier for elephants to make infrasonic sounds
              C．mother elephants don't let people stand near their babies
              D．humans can sense infrasonic sounds when they are made
              难度：较易
              解析 收藏 试题篮
            • 2．
              Do you know electricity can change the way we taste food？ Don't feel surprised at the fact． A special electric fork invented by Japanese researchers could make any dish taste salty．
              According to Hiromi Nakamura， a Post Doctor Researcher at Meiji University of Japan， the technology can be very useful for people with special eating habits． For example， the sick with high blood pressure （高血压） can easily develop a low-salt eating habit and still enjoy delicious food． And with the fork， there's totally no risk of over-salting their food． Luckily， the voltage （电压） is so small that it is safe to use the fork．
              The idea of adding electricity to food was first shown to public as an experiment at the Computer Human Interaction Conference in Austin， Texas， in 2012． Nakamura and her team connected a wire （导线） to a 9-volt battery （电池） and passed it through a straw （吸管） placed in a cup of sweet lemonade． Volunteers reported that the lemonade tasted not as sweet as it usually was， because the electricity created the taste of salt．
              Nakamura has improved the technology to be able to make the electricity reach the food through forks and chopsticks． "The metallic part of the fork is one electrode （电极）， and the handle is the other，" Nakamura explained． "When you take a piece of food with the fork and put it in your mouth， you connect the circuit． When you take the fork out of your mouth， you disconnect the circuit． So it actually works as a switch．"
              Simon Klose， TV presenter of food program Munchies， who recently visited Nakamura to try out the fork himself， then said it was one of the greatest eating experiences he'd ever had． "When I first heard of electric food， it sounded terrible．" he said． He later continued to use the fork to eat pieces of fried chicken， and found that the saltiness greatly increased as the electricity was connected．
              Nakamura has been eating "electric" food for the past three to four years in order to understand it better． "For me，" she said， "it may seem like we're cooking but we're actually working on the human taste．"

              (1) The electric fork may be good for people who ______ ．
              A. need to lose weight
              B. work as researchers
              C. show interest in physics
              D. have high blood pressure
              (2) Paragraph 4mainly tells us ______ ．
              A. what creates the taste of salt
              B. how the electric fork works
              C. where the electric fork was invented
              D. when the technology was known to public
              (3) What can we learn from the passage？ ______
              A. The electric fork can create unreal taste．
              B. A researcher from the USA invented the electric fork．
              C. People can use the electric fork by pushing the switch．
              D. The idea of adding electricity to food was first shown in a TV program．
              (4) Which of the following would be the best title for this passage？ ______
              A. A Famous Researcher．
              B. An Interesting Experiment．
              C. A New Invention．
              D. A Great Eating Experience．
              难度：较易
              解析 收藏 试题篮
            • 3．
              Can we "design" a baby like we design a handbag？ It may sound crazy， but a "designer baby" could be possible now． Of course， at the same time， there are both agreements and disagreements with it．
              The "designer baby" idea comes from the research that allows scientists to make changes to human DNA and genes （基因）． Usually， it is done when the baby is still just an embryo （胚胎）． By doing that， scientists hope that "designer babies" will less possibly be born with some certain serious illnesses．
              During the 21st century， the idea became so popular that the research developed very quickly． Now， it has been firstly used to help born babies with their illnesses． One example of this is that Dr． Adrian Thrasher of University College London was able to save a 1-year-old child from leukemia （白血病） with the help of it． eople learned that it was not only illnesses they could change， but also a baby's gender and looks． A well-known event happened in 1996． An American couple， Monique and Scott Collins， decided to use this research to help them choose the gender of their next baby． They wanted to have a baby girl for they have had three sons． Moreover， people could also decide babies' eye color， hair color and even things like height or how sportive babies will be．
              Some people argue that it is not ethical （道德的）to design babies like designing a bag． It is strongly against the nature's rules． Besides， it may not have any bad influence on the baby now， yet no one knows what will happen to him and his children after many years．

              (1) Now we can "design" a baby from ______ ．
              A. designing a handbag for a baby
              B. changing the DNA and genes of a human embryo
              C. stopping the embryo from growing up
              D. working on the computer
              (2) Scientists hope to ______ ．
              A. stop babies getting serious illnesses before birth
              B. have more sports playrs born
              C. make prettier babies
              D. give us smarter babies
              (3) What does the underlined word " gender" mean in the third paragraph？ ______
              A. 性格
              		B. 性别
              		C. 外貌
              		D. 个性
              (4) It is thought that the "designer baby" idea ______ ．
              A. follows the nature's rules
              B. can save everyone in the world
              C. also has some bad sides
              D. shouldn't be used in any field
              难度：较易
              解析 收藏 试题篮
            • 4．
              What's sleepwalking（梦游）？Sleepwalking usually happens in the first few hours of sleep． Not all sleepwalkers walk when they are sleeping． Some just sit up or stand on the bed． Some even get up and walk around for a few minutes or half an hour． Some do things as if they were awake， but in fact they are not!
              Sleepwalkers' eyes are open and they usually go back to beds by themselves． But they won't remember it the next morning．
              About 15% of kids sleepwalk． Sleepwalking sometimes happens when a person is ill or worried， or doesn't get enough sleep． If sleepwalking happens often， you should see a doctor． If it doesn't， you don't need to worry． Here are some ways to help stop sleepwalking：
              * Listen to some music and relax before going to bed．
              * Go to bed at a regular time every night．
              * keep your bedroom quiet and dark when you try sleeping．
              * Don't drink a lot of water in the evening and be sure to go to the bathroom before going to bed．

              (1) When sleepwalkers sleepwalk， they don't ______ ．
              A. sit up
              		B. walk around
              		C. stand on the bed
              		D. wake up
              (2) Sleepwalkers usually go back to beds ______ ．
              A. the next morning
              		B. after waking up
              C. by themselves．
              		D. with the help of others
              (3) Which of the following statements is Not true？ ______
              A. About 15% of kids sleepwalk．
              B. Sleepalkers can remember what they did the next morning．
              C. sleepwalking sometimes happens when a person is ill．
              D. sleepwalking sometimes happens when a person doesn't get enough sleep．
              (4) The best title of this passage may be " ______ "
              A. Sleepwalking and Ways to Stop It
              B. The Reasons of Sleepwalking
              C. How to stop sleepwalking
              D. When Do People Sleepwalk
              难度：较易
              解析 收藏 试题篮
            • 5．
              We know mosquitoes very well． Mosquitoes（蚊子）fly everywhere． They can be found almost all over the world， and there are more than 2，500kinds of them．
              No one likes the mosquito． But the mosquito may decide if she loves you． She？ Yes， she． The male（男性的） mosquito doesn't bite! Only the female（女性的） mosquito bites because she needs blood（血） to lay eggs． She is always looking for things or people she wants to bite． If she likes what she finds， she bites． But if she doesn't like your blood， she will turn to someone else for more delicious blood． Next time a mosquito bites you， just remember you are chosen． You're different from the others!
              If the mosquito likes you， she lands on your body without letting you know． She bites you so quickly and quietly that you may not feel anything different． After she bites， you will have an itch（痒） on your body because she puts something from her mouth together with your blood． When the itch begins， she has flown away．
              And then what happens？ Well， after her delicious dinner， the mosquito feels tired． She wants to find a place to have a good rest． There， in a tree or on a wall， she begins to lay eggs， hundreds of eggs．

              (1) we know Mosquitoes very well because ______ ．
              A. they are very famous and popular
              B. they fly here and there
              C. there are many kinds of them
              D. they can bite
              (2) mosquitoes usually bite you ______ ．？
              A. when you're asleep．
              B. to draw your attention
              C. very quickly and quietly
              D. because she doesn't like you．
              (3) which of following is wrong？ ______
              A. some mosquitoes don't bite people．
              B. itching begins after being bitten by a mosquito．
              C. female mosquitoes need blood to lay eggs．
              D. mosquitoes bites everyone．
              难度：较易
              解析 收藏 试题篮
            • 6．
              Mexican people have a tradition of greeting each other with handshakes and kisses on the cheek． But recently， the government asked people to stop doing this． They have also closed schools and museums， and advised people to stay at home．
              This is to stop people from catching an infectious （传染性的） disease， swine flu （猪流感）． The disease has spread over the country in the past month． It has killed 159people and caused 4，000to become sick．
              What is swine flu？ Swine flu is a disease that causes illness in pigs． It spreads to people in two ways． They catch the virus （病毒） after being with infected pigs， or they get it from an infected person．The disease spreads in the same way as human flu， through coughs and sneezes， or by touching a contaminated surface （被污染的表面） and then touching the nose or mouth． However， it cannot be spread by eating pork． People who have caught swine flu will have a fever， a cough， a sore throat and body aches． In most cases， the infection makes people unwell but their lives will not be in danger．
              How serious is the situation？
              Since swine flu started in Mexico about a month ago， it has spread to a few other countries． The US has reported 65cases and Canada has reported 13cases． Other countries are checking for possible cases． Last week， the World Health Organization said the flu was a "public health emergency （紧急情况）"． It says the disease could become a global outbreak．
              A few governments around the world have advised people in their countries not to visit Mexico． Some countries have begun checking air travelers for the disease． Russia， China and other countries have stopped buying pork from Mexico， though the flu cannot be caught by eating the meat． Health experts advise people to wash their hands frequently， to cover coughs and sneezes and to stay home if they feel ill．

              (1) What does the story mainly tell us？______
              A. Swine flu is very different from bird flu．
              B. Swine flu is a kind of flu only caught by pigs．
              C. There are many ways to stop swine flu spreading．
              D. Swine flu has attracted wide attention because of its spread to many countries．
              (2) Which of the following is True？______
              A. The WHO said that swine flu might become a global problem．
              B. Swine flu is an infectious disease which is only spreading in Mexico．
              C. The expert said swine flu could be caught by eating pork．
              D. All Mexican people still greet each other in their traditional ways．
              (3) According to the article，______ hasn't found swine flu yet．
              A. the US
              		B. Mexico
              		C. Russia
              		D. Canada
              (4) We can infer from the article that______．
              A. swine flu is a new kind of flu and we don't know anything about it
              B. people in other countries don't like Mexicans because of swine flu
              C. if we wash our hands carefully， we'll be completely safe from swine flu
              D. if we follow the experts' advice， we won't catch swine flu very easily
              难度：较易
              解析 收藏 试题篮
            • 7．
              Help! Is This My
              Body？
              Has this ever happened to you？ You're dressing for a party and when you pull on your favorite years， you can no longer button them． If you've ever felt out of step with your body， you're not alone． We become more aware of （意识） looks right around the time our bodies begin changing． This can make physical changes difficult to deal with emotionally． Getting used to a changing body is about more than just looks， though， Lots of teens base their self-image （自我形象） on how their bodies feel and perform． Changes in our bodies' appearance， performance-even such small details as the way they smell-are all perfectly normal parts of growing up．
              So what can you do to help become more comfortable with your body physically and emotionally？ Here are some ideas．
              Don't compare! It's natural to look at our friends for comparison．
              But it's not a good idea． Comparing ourselves with others is problematic became everyone develops differently and at different times． If you go through a growth sport （increase） early， you may feel too tall． Yet your friend may be thinking that he or she is too small． It's usually hardest for the people who develop first or last．
              Treat your body well． Making educated choices about food exercise is part of developing a mind and life of your own． Healthy eating and exercise can also give you some control over how your body turns out． Many teens stop playing sports around the time their bodies develop． You can still do any activity if you really are interested in it． It's also all right to switch （转换） to another activity． Don't stop exploring how your body feels． Do different activities that help you become more familiar with your body．
              Walk tall-even if you're not! There's not much you can do about your height or development， but you can focus on what you really like about yourself． Maybe it's your curly hair or the dimple （酒窝） you get when you smile． Maybe it's that you are a really thoughtful person or you are good at making people laugh． As your body changes， it can help to work on good posture and walk with a sense of confidence． After doing this for a while， you'll probably become more confident too．
              Accept and appreciate your body， no matter what it looks like right now． and-just like a good friend-it can do a lot for you in return!

              (1) What does the writer think of comparing oneself with others？______
              A. It's good way to build teens' self-confidence．
              B. It's wrong because not everyone wants to be perfect．
              C. It's necessary if teens want to know how well their bodies develop．
              D. it's unreasonable because teens' bodies don't develop at the same speed．
              (2) What does the writer suggest teens do in Paragraph 4？______
              A. Stop playing dangerous sports．
              B. Eat more to get more energy．
              C. Make wise food and exercise choices．
              D. Do different activities that strengthen the body．
              (3) What's the writer's purpose of writing this passage？______
              A. To encourage teens to be different from other．
              B. To advise teens to properly deal with their body changes．
              C. To invite teens to join in more sports and have a healthier diet．
              D. To help teens realize that their bodies are always changing．
              难度：较易
              解析 收藏 试题篮
            • 8．
              Mindlessly checking Facebook makes you an awful lot like a lab rat （老鼠） continuously pushing a button in order to get a treat．
              When you check your phone， your brain gets its own little zing； Someone might be talking about you on Facebook! No？ Reload． Maybe your Instagram got a heart! Reload． Reload．

              But you're no rat． Human brains can fight the ways apps hijack our brains， if we learn some skills to deal with this problem．
              Are Facebook or Twitter "addictions" （瘾）？ Recent scientific research about social media （媒体） doesn't agree on that term， but evidence （证据） that we aren't doing well is present at dinner tables where everyone is staring at screens， and at crosswalks where absent-minded people walk into traffic．
              I became mindful of my early-morning bad habits． Pre-coffee， half awake， I'd lie there for an hour with my phone． So I called up psychologists， brain scientists and app designers for advice on what actually would help me．
              Surprisingly， they didn't tell me to immediately stop， but instead told me I needed the skills for managing social media as part of my life．
              Limit Triggers （诱因）
              Our brains are made to quickly eat up information． So why let social-media companies decide when to attract you？ Turn off app notifications （通告） on your phone and computer． Especially for live video broadcasts． They are designed to create the fear of missing out．
              Avoid Quicksand
              When you're on Facebook， it is easy to red one article， then another．
              Nir Eyal， author of the 2014 book "Hooked" says he forces himself not to read anything right away． Instead， he saves articles to a service called Pocket， which reads them aloud while he's at the gym．
              We hurt ourselves when we use social media as a break from serious work．Our brains need a chance to be empty．Research suggests the best way to help your brain focus is exercise， even for a short period． Staring into space would be better than refreshing Facebook．
              Make New Norms
              Not that long ago， you could be fired for not paying attention during a meeting or class； now， many openly use their phones or laptops．
              Bosses could set a better work culture by providing charging（充电）stations at meetings where everyone could leave their phones， then focus on the discussion at hand． Mr． Eyal suggests you try shaming friends who have bad habits -if you do it politely． If someone is not listening to you at dinner． ask， "Is everything OK？" The answer might start an important conversation．
              Tech Should Help
              The social-media industry has a responsibility here， too． Since companies usually know exactly how much time users spend on their apps． they should offer help to people who have problem behavior． And for the rest for the rest of us， let's encourage app makers to make their products more helpful， not more demanding of our time．

              (1) What does the underlined word "hijack" in Paragraph 3probably mean？______
              A. Wash．
              		B. Hurt．
              		C. Control．
              		D. Empty．
              (2) Why does Mr． Eyal save articles to Pocket？______
              A. To rest his tired brain．
              B. To refresh his Facebook immediately
              C. To get more time to exercise．
              D. To avoid being attracted by social media．
              (3) What is the best title of this passage？______
              A. Take a break from busy life．
              B. Free your brain from social media．
              C. Separate social life your work．
              D. Keep your life away from apps．
              (4) What can we infer from the passage？______
              A. The social-media industry should make more app products．
              B. People with problem behavior should ask brain scientists for help．
              C. We should decide when to connect to social media by ourselves．
              D. A company with charging stations must have a better work culture．
              难度：较易
              解析 收藏 试题篮
            • 9．
              Choose the best answer（根据短文内容，选择最恰当的答案）
              When taking an elevator， do you often push the "close" button？ You hope by pushing it， the elevator door will close faster． But what if the button is actually fake（假的）？
              Karen Penafiel is the executive director（执行董事）of the US National Elevator Industry． She said that elevators' "close" buttons are a complete trick， at least in the US， and that doors will not close any faster no matter how hard you push．
              In the 1990s the Americans with Disabilities Act（《美国残疾人法案》）was passed in the US． It means all elevators have to stay open long enough to allow disabled（残疾的）people to enter． Only US firefighters and elevator workers can really use the buttons with special keys．
              But the buttons aren't completely useless． According to psychologists（心理学家）， fake buttons can make you feel better． They give you a sense of control that can help reduce stress． That's why some other buttons in our lives are fake， too．
              For example， many offices in the US have fake thermostats（温控器）． People may feel better when they think they can control the temperature in their workspace．
              You were told that traffic light buttons could help make the traffic signals change faster． But they may not really work either．
              However， even when people know these little "white lies"， they still push fake buttons． As long as the doors finally close， it seems worthy．
              John Kounios is a psychology professor at Drexel University in the US． He told The New YorkTimes that he always pushes the traffic light buttons． "After all， I've got nothing else to do while waiting． So why not push the button on the off chance that this one will work？"

              (1) You push the "close" button in the US， the elevator door will ______ ．
              A. close immediately
              B. not be completely open
              C. play a trick on you
              D. not close as fast as you wish
              (2) The US， in order for disabled people to go in safely， ______ ．
              A. elevator workers will press the "open" button for them
              B. they will be given a special key to use in the elevators
              C. all elevators are designed to open long enough
              D. no "close" button is fixed on the elevators
              (3) Which of the following is NOT mentioned as fake？ ______
              A. Thermostat buttons．
              		B. Elevator buttons．
              C. Traffic light buttons．
              		D. Power buttons．
              (4) There are quite a few fake buttons in our lives because they can ______ ．
              A. control people's senses
              B. help people feel better
              C. control the temperature
              D. tell "white lies"
              (5) The underlined words " on the off chance" in the last paragraph most probably mean " ______ "．
              A. with the little hope
              		B. without any plan
              C. with a great opportunity
              		D. without any possibility
              (6) The best title for the passage is ______ ．
              A. Button pushing society
              B. Useless buttons
              C. Buttons for disabled people
              D. Fake elevator buttons
              难度：较易
              解析 收藏 试题篮
            • 10．
              Imagine the situation：You are driving across a desert or on a mountain at night．It is cold．You have no idea where you are．Then your car breaks down．You have no mobile phone either．What should you do？Well，take the GPS with you next time．It is a device（装置）which can find the user's
              location with the help of satellites（卫星）．It cannot start your car，but at least you will know where you are．
              GPS，which is short for Global Positioning System，is a small radio receiver．It looks like a mobile phone．You can hold it in your hand or put it in your pocket．It is sometimes put into a watch or a telephone．You can also find GPS devices in cars，planes and boats．There are electronic maps in some of those devices，so they can help you know exactly where you are．For example，in a city they can tell you the name of the street．
              There are three parts in the GPS system．The first part is the receiver．You can hold it in your hand，or it can be fixed into your car，plane，etc．The second part is the satellites circling the Earth．The receiver contacts at least four of them．The third part of the system is the network of ground stations all over the world．They control the satellites and make sure they are working well．
              Some people think that in the future the GPS devices will be as common as the mobile phones．They will become cheaper and more accurate（精确的）．There will also be new uses for them．Perhaps they will be like watches．Everyone will have one and nobody will be lost．

              (1) According to the passage，people ______ with the help of the GPS．
              A. won't be lost in a new city
              B. can't find their way in strange countries
              C. can get to another place in less time
              D. can learn about the culture of an unknown place
              (2) Why can the GPS device help you know where you are？ ______
              A. Because it looks like a mobile phone．
              B. Because you can hold it in your hand．
              C. Because there are some electronic maps in some of them．
              D. Because it is a small radio receiver．
              (3) We can learn from the passage that ______ _．
              A. a GPS device can't be put into a watch
              B. there are three parts in the GPS system
              C. a GPS device can help you start your car
              D. the GPS is becoming more and more expensive
              (4) The underlined word"them"in Paragraph 3refers to（指的是）" ______ "．
              A. receivers
              		B. devices
              		C. satellites
              		D. stations
              (5) What can we infer（推断）from the passage？ ______
              A. All GPS devices have electronic maps．
              B. People in many countries will use the GPS for free．
              C. The receiver of the GPS contacts at least five of the satellites．
              D. The GPS will become more common in daily life in the future．
              难度：较易
              解析 收藏 试题篮
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