He Jiang，a postgraduate（研究生）in biology，will become the first Chinese student to give a speech in the commencement（毕业典礼） at Harvard University on May 26，2016．
Given the highest honor by the university．He Jiang，who was born in a small village in Hunan province，said，"People in China often believe that it's useless to study and children from the countryside cannot be successful in the future．However，I cannot agree with them．Education can change a person's life．I hope my experience can encourage the students from the countryside to spare no effort in studyand make their dream come turn．"
Different from many other families in the village，his parents never though about finding a job in big cities and leaving their two sons at home without their care．His farther was strict about their studies．He and his younger brother studies at home while the other kids in the village played in the fields．Unlike his strict farther，his mother took her sons'side when her husband scolded the boys．She preferred to sit with her sons when they studied rather than chat with other women in the village．
Getting the chance to speak at commencement is no accident．During his first days in Harvard，it was quite difficult for him to follow the professor in class and he was speechless in campus because of his poor English．Instead of giving up．He Jiang spent all his free time on English．He also make friends with natives to improve his speaking English．One year later，he had little difficulty in class and soon became one of the top students in his class．With the encouragement from Professor Diana Eck，He Jiang decided to apply（申请） for the chance to speak at the commencement．"Few Chinese students had applied before，but I wanted to have a try．I just want to realize my idea of letting more people hear the voice from China and telling them that China is not what it used to be．"said He Jiang．After beating three students from Harvard Kennedy School in the third and final round，He Jiang made it to get the chance to speak at the commencement．
He Jiang will go to Massachusetts Institute of Technology after graduating from Harvard．
66．Where will He Jiang give the speech？
A．Harvard University
B．Hunan Province
C．Harvard Kenney School
D．Massachusetts Institute of Technology
67．The underlined part means" "
A．get ready for study
B．try their best in study
C．enjoy themselves in study
D．be interested in study
68．Which of the following is true according to the passage？
A．He Jiang is the only child in the family
B．Both of He Jiang's parents were very strict with him
C．He Jiang's parents never tried to find a job in a big city
D．He Jiang often played in the fields with other kids in the village
69．Paragraph 4 mainly tells us
A．how He Jiang got the chance
B．how hardworking He Jiang was
C．why He Jiang applied for the chance
D．what He Jiang studied in Harvard
70．From the passage，we can know that
A．like father，like son
B．the early birds get worms
C．practice makes perfect
D．where there is a will，there is a way．
We all know health is the most important in our life and we know smoking is harmful to people's health．But not many people know about the danger of second﹣hand smoke．
Second﹣hand smoke is the smoke that comes from the smoker's breath．If people breathe in second﹣hand smoke from time to time，they could get sick from it．It can cause lung cancer（肺癌）and many other diseases．
But how serious is the problem of the second﹣hand smoke？The World Health Organization（WHO） did a study of 194 countries．They found that second﹣hand smoke causes about 600，000 deaths every year．That is about 1% of the world death and it leads to a lot of trouble and pain．
Second﹣hand smoke is especially harmful to children because their bodies are growing．According to a study，around 165，000 children under 5 die each year because of second﹣hand smoke．Most of these deaths happened in Africa and Southem Asia where health care is very poor．
You can do something to keep yourself and other people away from second﹣hand smoke．You can ask the smokers，such as your parents，to smoke outside．And，if someone smokes close to you，you'd better hold your breath or just walk away．
根据短文内容，选择最佳选项．
61．The underlined word"breath"in the passage means" "in Chinese
A．脉搏
B．呼吸
C．感染
D．传染
62．According to the passage，which statement is right？
A．There are 194 countries in the world．
B．The total death of the word is about 600，000
C．Second﹣hand somke is wores for adults（成人）than children
D．Health care is very poor in Africa and Southern Asia
63．What dose the writer think is the most important in life？
A．Health
B．Friendship
C．Love
D．Money
64．How can you keep away from second﹣hand smoke？
A．Standing close to the persons who smoke
B．Asking your parents to go out of your house
C．Holding your breath all the time
D．Walking away from the smokers
65．The best title of this article may be" "
A．Smoking
B．second﹣hand Smoke
C．Giving up Smoking
D．Smoking is harmful to children．
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56．Mr zhang，34，can speak Chinese and English well．He may get the job
A．as a swimming coach
B．as a cleaner
C．at the summer camp
D．as a presenter
57．If you have time in summer and you are an excellent swimmer，you can call to get a job．
A.77665388
B.66773439
C.54279686
D.63360022
58．If a cleaner worker for Mr huang for a month，he or she will be given yuan
A.640
B.480
C.320
D.160
59．David is a college student and his English is very poor，he can
A．call the SUN HOUSE
B．send an e﹣mail to brsyswim@163．com
C．send an e﹣mail to summer camp@hotmail，com
D．visit Mr．huang at No.5 Chaoyang Street
60．The four ads above are probably from
A．a newspaper
B．a novel
C．a science magazine
D．a textbook．
All over the world the need for more laptops and computers increases each year．Networks have been part of our life．Probably everyone with a portable device （移动设备）has once logged on to a public WiFi network without paying for it，while they are having a coffee，on a train，in a shopping mall or at a hotel．However，is this kind of public WiFi network safe？
Some networks are better protected than others because encryption （加密）methods are used．Therefore，they are safer than others．But a survey in 2015 showed that more than 950 million records were not protected，including addresses，emails，birth dates，phone numbers，passwords and so on．These open WiFi networks are really not safe，because it is very easy for hackers （黑客） to break into the operating system and get people's private information．
Most smartphones and laptops，by themselves，search and connect to WiFi networks．They usually prefer a network with a connection that has been used before．Hackers'devices are able to record these searches and look like the trusted WiFi networks．When these smartphones and laptops log on to the networks which are not real，hackers can easily steal their private information．
So next time，when we want to use our laptops or our smartphones in public places which offer free WiFi networks，please think it twice or take safe measures before using them．
42．Why do people like to go log on to a public WiFi network？
A．Because it can provide useful information．
B．Because the owner of the network is polite．
C．Because it is free．
D．Because it is safe．
43．We can learn from the passage that
A．not all the public WiFi networks are safe
B．none of the public WiFi networks is safe
C．in 2015more than 950million records were protected
D．there is no way to protect our private information
44．Hackers would probably get the following EXCEPT when we connect our laptops or smartphones to a public WiFi network．
A．our birth dates
B．our passwords
C．our phone numbers
D．our smartphones
45．Which of the following can be the best title of this passage？
A．Don't Use Public WiFi Networks
B．Why the Public WiFi Networks a Possible Danger
C．We Needn't Protect Our Private Information
D．Why Hackers Break into the Operating System．
In the UK．Saturday evenings have always been a popular time for families to watch television together．One of the most popular programme genresis the talent show，partly because people of all ages are interested in it．
Early shows，like Opportunity Knocks （1965﹣1978），required people to vote （投票）for their favorite acts and performers，although in those days voting was done by postcard instead of by telephone，text，or over the Internet．Today，the success of television talent shows has reached a new level．Here are Ihe UK's top three TV talent shows：
The X Factor In this wonderful singing competition，performers have to face a celebrity judge panel （名人裁判组）before the public vote．Many excellent singers became popular because of it．The show is now made all over the world，from China to Colombia．
Strictly Come Dancing﹣The programme is so fantastic that it attracts many celebrities．They team up with professional （专业的）dancers and come to the dance floor to win the title of Strictly Come Dancing Champion．
Britain's Got Talent﹣In this modern﹣day version （版本）of Opportunity Knocks，the public can go and choose from many kinds of acts，from dancing dogs to ice skating．The prize is to perform for the Queen in the Royal Variety of Performance．
38．When did the show Opportunity Knocks begin？
A．In 1965．
B．In 1978．
C．In 2015．
D．K is not mentioned．
39．If a person loves a skating act，he or she may go to ．
A．Opportunity Knocks
B．Strictly Come Dancing
C．The X Factor
D．Britain's Got Talent
40．Which of the following is NOT true according to the passage？
A．The winners of Britain's Got Talent can perform for the Queen．
B．If you want your dog to have a performance，you can go to Britain's Got Talent with it．
C．Opportunity Knocks is still on television now．
D．People of all ages enjoy TV talent shows in UK．
41．The underline word"genres"in the first paragraph means ．
A．lists
B．types
C．choices
D．expressions．
Students at a primary school in Fuzhou，Hast China's Fujian Province were required to clean the school toilets to help them develop good habits．But some parents are strongly against the idea．They can't see the advantages of students doing such chores （杂亊）．They think that the school should provide students with a proper education，not the chance to be school cleaners．
In fact，parents，schools and society play an equally （同等地）important role in developing the character of students．It is good for schools to give students such tasks，because few of the students will do them at home．Their parents want them to do homework only．
In recent years，some parents will make mountains out of molehills when students are asked to do some chores in schools．Some complain about the teachers if their kids get hurt in schools； some even challenge the schools'teaching methods and management．As a result，many primary schools，especially those in big cities，do not let students join in outdoor activities during breaks，fearing that they might get hurt．This is bad for the development of students'best qualities．
What the primary school in Fuzhou is doing is worth praising．Doing chores can put a sense of responsibility into students'minds and teach them the spirit of rules as well as teamwork．Also，it can make students'in﹣school experiences more meaningful．
34．A primary school in Fuzhou required the students to ．
A．do homework only
B．finish homework at school
C．clean the playground
D．clean the school toilets
35．Some parents think that the school should provide students with ．
A．a proper education
B．a chance to be cleaners
C．a chance to be teachers
D．more housework
36．The underlined phrase "make mountains out of molehills" means
A．愚公移山
B．山穷水尽
C．小题大做
D．眉飞色舞
37．What is the main idea of the passage？
A．Students shouldn't do any chores in school．
B．Parents require students to do some chores in school．
C．Some parents think doing some chores is harmful to students．
D．Doing some chores can develop students'good qualities．
How Much Can We Afford to Forget？
In 2018， Science magazine asked some young scientists what schools should teach students． Most said students should spend less time memorizing facts and have more space for creative activities． As the Internet grows more powerful， students can access （获得） knowledge easily． Why should they be required to carry so much of it around in their heads？
Civilizations（文明）develop through forgetting life skills that were once necessary． In the Agricultural（农业的）Age， a farmer could afford to forget hunting skills． When societies industrialized， the knowledge of farming could be safe to forget． Nowadays， smart machines give us access to most human knowledge． It seems that we no longer need to remember most things． Does it matter？
Researchers have recognized several problems that may happen． For one，human beings have biases（偏见），and smart machines are likely to increase our biases． Many people believe smart machines are necessarily correct and objective，but machines are trained through a repeated testing and scoring process．In the process， human beings still decide on the correct answers．
Another problem relates to the ease of accessing information． When there were no computers， efforts were required to get knowledge from other people， or go to the library． We know what knowledge lies in other brains or books， and what lies in our heads． But today， the Internet gives us the information we need quickly． This can lead to the mistaken belief﹣the knowledge we found was part of what we knew all along．
In a new civilization rich in machine intelligence， we have easy access to smart memory networks where information is stored． But dependency on a network suggests possibilities of being harmed easily． The collapse of any of the networks of relations our well﹣being（健康）depends upon， such as food and energy， would produce terrible results． Without food we get hungry； without energy we feel cold．And it is through widespread loss of memory that civilizations are at risk of falling into a dark age．
We forget old ways to free up time and space for new skills．As long as the older forms of knowledge are stored somewhere in our networks， and can be found when we need them， perhaps they're not really forgotten． Still， as time goes on， we gradually but unquestionably become strangers to future people．
（1）Why are smart machines likely to increase our biases？
A．Because they go off course in testing and scoring．
B．Because we control the training process on them，
C．Because we offer them too much information．
D．Because they overuse the provided answers．
（2）The ease of accessing information from the Internet •
A． frees us from making efforts to learn new skills
B． prevents civilizations from being lost at a high speed
C．misleads us into thinking we already knew the knowledge
D．separates the facts we have from those in the smart machines
（3）The word "collapse" in Paragraph 5 probably means" "．
A．a sudden failure
B．the basic rule
C．a disappointing start
D． the gradual development
（4）What is the writer's main purpose in writing this passage？
A．To question about the standards of information storage．
B．To discuss our problems of communication with machines．
C．To stress the importance of improving our memorizing ability．
D．To remind us of the risk of depending on machines to remember．
Sometimes it seems that time is flying． Perhaps it doesn't need to feel this way． Our experience of time can be possibly changed． By understanding the psychological （心理学的） processes behind our different experiences of time， we might be able to slow down time a little．
One basic law of psychological time is that time seems to slow down when we're exposed（接触） to new environments and experiences． The law is caused by the relationship between our experience of time and the amount of information our minds process． The more information our minds take in， the slower time seems to pass．
It follows， then， that we have different experiences of time in different situations． In some situations， our life is full of new experiences． Our minds process a lot of information and time seems to slow down． In other situations， we have fewer new experiences and the world around us becomes more and more familiar（熟悉的）． We become insensitive to our experience， which means we process less information， and time seems to speed up．
How can we slow down time？ Here are two suggestions．
Firstly， since we know that familiarity makes time pass faster， we can expose ourselves to as many new experiences as possible． We can give ourselves new challenges， meet new people， and expose our minds to new information， hobbies and skills． This will increase the amount of information our minds process and expand （增加） our experience of time．
Secondly， and perhaps most effectively， we can give our whole attention to an experience﹣to what we are seeing， feeling， tasting， smelling or hearing． This means living through our senses rather than through our thoughts． For example， on the way home， focus your attention outside of yourself， instead of thinking about the problems you have to deal with． Look at the sky， or at the buildings you pass， traveling among them． This open attitude to your experiences helps take in more information and also has a time﹣expanding effect．
To a certain degree， we can understand and control our experience of time passing． It's possible for us to slow down time by expanding our experience of time．
（1）According to the writer， we can expand our experience of time by ．
A． going to bed on time
B． traveling to new places
C． having dinner as usual
D． printing the same materials
（2）What can we learn from the passage？
A． Being familiar with the world around helps us get more information．
B． Understanding psychological time makes life pass more quickly．
C． We can take in more information by living through our senses．
D． We should build a stronger relationship between time and us．
（3）Which of the following would be the best title for the passage？
A． Slow Down Time
B． Only Time Will Tell
C． Race Against Time
D． Time Will Not Come Twice
Say you're sitting around with some friends playing video games and someone mentions a game that happens to be one of your favorites．"Oh，that game's easy．So not worth the time，"one of your friends says．The others agree．Although you enjoy the game quite a lot，not wanting to argue with them，you go along with the crowd．
You have just experienced what is commonly referred to as peer pressure（同伴压力），also called peer
influence．You will adopt a certain type of behavior，dress，or attitude in order to be accepted as part of a group of your"peers"．As a teen，you are likely to have experienced the effect of peer pressure in a number of different areas．
We are all influenced by our peers at any age．For teens，as school and other activities take you away
from home，you may spend more time with your friends than with your family．As you become more
independent，your peers naturally play a greater role in your life．
According to Dr．Casey from Cornell University，teens are very quick and accurate in making decisions
on their own and in situations where they have time to think．However，when they make decisions in the
heat of the momentor in social situations，their decisions are often influenced by factors like peers．In a
recent study，teen volunteers played a video driving game，either alone or with friends watching．The
researchers discovered that the number of risks teens took more than doubled when their friends were
watching，compared with when they played alone．This shows that teens may find it more difficult to control risky behavior when their friends are around，or in situations where they are extremely angry．
Just as people can influence us to make unwise choices，they can also influence us to make good ones．A teen might join in a volunteer project because his or her friends are doing it，or get good grades because his or her friends think getting good grades is important．In fact，friends often encourage each other to study，or try out for sports．
While we are always influenced by those around us，the decision to act or not is up to us．So when it
comes to decision making，the choice is up to you．
52．According to the passage，Dr．Casey probably agrees that teens ．
A．like to play driving games with their friends
B．prefer situations where they have time to think
C．may take more risks when their friends are around
D．are slow in making decisions when they are on their own
53．The words" in the heat of the moment"in Paragraph 4 probably mean" "．
A．when teens avoid possible risks
B．when teens trust their judgment
C．when teens lose control over their anger
D．when teens give consideration to situations
54．What can we learn from the passage？
A．Teens are eager to be different from their peers．
B．Peer pressure has effects on both teens and adults．
C．Peer pressure does more harm than good to teens．
D．Tees think it challenging to get good grades at school．
55．Which of the following would be the best title for the passage？
A．Peer Pressure：Is It Necessary to Deal with It？
B．Peer Pressure：Is It Possible to Get Away from It？
C．Peer Pressure：Its Benefits to Teens and Friend Making
D．Peer Pressure：Its Influence on Teens and Decision Making．
Would you like to live in a city where buildings turn the lights off for you， and self﹣driving cars will find the nearest parking space themselves？ Although it might sound a little far from you， living in a "smart" city like this could happen sooner than you think．
Great changes have taken place in towns that we have lived in for centuries， while completely new cities are being built． One such place is the city of Songdo． Every home there will have a "telepresence" system（远程遥控系统）﹣ allowing users to control the heating and locks， take part in video meetings， and receive education， healthcare and government services． Around the city， escalators（自动扶梯） will only move when someone is on them， and offices and schools will all be connected to the system．
The great mind behind Songdo is from the company Cisco． In fact， technology companies around the world such as IBM， Siemens and Microsoft are already in the business．
About 75% of the world's population will live in cities by 2050， so cities will need to be more modern to deal with the coming problems． " Making cities smarter is one way out， and I think this will in turn make cities greener， "said Dan Hill， head of a research company．
（1）According to the text， living in a "smart" city ．
A． is not a green way
B． will be far from you
C． will soon become true
D． is completely impossible
（2）What is Paragraph 2 mainly about？
A． A city of the future．
B． A meeting in Songdo．
C． A plan to build a house．
D． A report on public health．
（3）Which company offers the great mind to build Songdo？
A． Cisco．
B． IBM．
C． Siemens．
D． Microsoft．
（4）Dan Hill thinks that making cities smarter is one way to ．
A． drive people out of cities
B． control the world's population
C． develop his own company
D． solve the cities' coming problems
（5）Which of the following might be the best title for the text？
A． Future Education
B． Smart Cities
C． Government Services
D． Famous companies
It's a cold， grey Sunday afternoon in March． The British are all working in their gardens． They're digging， cutting leaves and planting new seeds（种子）． By summer， their gardens will be full of bright colours．
The British love their gardens． A British newspaper recently asked people for their opinions about them． Around 70% of the people felt it was important to spend time in the garden， and over 50% of these described gardening as the most enjoyable thing they ever did．
Only one in ten houses in Britain do not have a garden． People who live in houses without gardens often rent（租用） land from the government．
At first， only very rich people had gardens． You can still see the gardens around houses with a long history， such as Chatsworth House or Castle Howard． In the early twentieth century， however， gardening became a hobby． People bought different kinds of seeds and plants for their gardens． Although roses， sunflowers and tomatoes are often grown in British gardens， they originally（起初） grew wild in other countries．
Every year， there are competitions for the largest vegetables， but don't expect to win； Britain's biggest carrot is almost six metres long ．
（1）In summer， British gardens are often ．
A． full of people digging there
B． colorful with different plants
C． too hot for people to work there
D． covered with grey leaves and plants
（2）A recent survey showed that of the British felt it important to do some gardening．
A． around 70%
B． over 50%
C． only 20%
D． about 10%
（3）We can infer from Paragraph 4 that ．
A． seeds were provided for free
B． roses were first grown in Britain
C． gardening is a hobby in the world
D． the owner of Chatsworth House was rich
（4）What does the writer mean by the underlined sentence？
A． It is easy to grow big vegetables．
B． It is hard to win the competition．
C． The carrot is much easier to grow．
D． The carrot is his favorite vegetable．
Culture Insider： Children's Games in Ancient China
During ancient times， children didn't have smart phone， iPad or computer to entertain them． Instead， they came up with interesting games to play in their childhood． Let's take a look．
News from China Daily 2017﹣06﹣01
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Kicking stone balls During the Qing Dynasty， kicking a stone ball around was a popular game in the northern part of China， and it was often played in winter to keep warm． |
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Playing hide﹣and﹣seek Hide﹣and﹣seek is a traditional game for children， popular around the nation． There are two ways to play： covering a child's eyes while other kids run around to tease（戏弄）him or， more commonly， others hide and one child must try to find them． |
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Flying kites Kites have quite a long history． The earliest kites were made of wood， instead of paper． The three most famous kites are the Beijing kite， Tianjin kite and Weifang kite． Each has its own feature． For example， the bird﹣shaped kite with long wings is a special kind of the Beijing kite． |
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Watching shadow plays（皮影戏） The closest thing to watching a film during ancient times was going to see a shadow play． The artists control puppets（木偶） behind the screen and tell stories to the music． |
（1）According to the text， the game of kicking a stone ball was ．
A． played in summer
B． like flying kites
C． invented in Beijing
D． popular in North China
（2）How is hide﹣and﹣seek usually played ？
A． One plays and others watch
B． Others laugh and one must cry
C． Others hide and one tries to find
D． One runs and others try to catch
（3）What does the underlined word " feature" mean in the text？
A．特征
B．地貌
C．五官
D．影片
（4）Which ancient game is like watching a film？
A． Kicking stone balls
B． Flying kites
C． Playing hide﹣and﹣seek
D． Watching shadow plays
TED is held in different cities around the world every year． TED stands for Technology，Entertainment， Design （设计）． With different speakers ﹣also from different parts of the earth ﹣ all the speeches are on their website， for everyone to see．
TED invites speakers to give speeches on a variety of topics （话题）． The different speakers are usually experts in their fields and talk about new ideas and recent developments． The speakers are often also well﹣known， such as Microsofts' Bill Gates and the animal expert， Jane Goodall． There are many talks on environment， how to help poor people， education and so on． While the talks cover a wide variety of topics， all speakers have a strict time limit （限制）﹣ each speech must last no longer than 18 minutes．
Everybody who has an Internet connection can visit TED's website ﹣ted．org． Every weekday， a new video is uploaded （上传） ， allowing people from all over the world to listen to talks for free． No longer than 18 minutes， the video is not really interesting， you know you are not going to waste too much time．
Most TED talks are in English but there are talks available in other languages， too． What's more，most of the English﹣language talks also have subtitles （副标题） in different languages． As a result，it's excellent for practicing English and learning new words， especially in a topic that you find interesting and enjoyable． With so many choices of topics， the videos are often much more exciting than the listening exercises used in many classes．
（1）What is TED stand for？
A． Technology， Education and Design．
B． Technology， Education and Dream．
C． Technology， Entertainment and Design．
D， Technology， Entertainment and Dream．
（2）What does the underlined word "variety" in Paragraph 2 mean in Chinese？
A． 多样性
B． 相似性
C． 递进性
D． 单一性
（3）What can we fill in the in Paragraph 3？
A． because
B． but
C． whether
D． even if
（4）Which of the following is TRUE？
A． A TED speech probably lasts about half an hour．
B． We can watch TED speeches to practice English．
C． We need to pay when we watch TED speeches．
D． Only rich people can make TED speeches online．
（5）The passage is
A． a poem
B． a story
C． an introduction
D． a letter
Mr. Guo is a teacher from Xi'an． He asked his students to hand in their homework through a QR code（二维码）．"We spent an hour or two in class learning how to generate（使产生）the codes， and in the end everything gets easier，" said Guo．"When students finish the homework， they keep it on WeChat． Then， each student makes his own QR code and gives it to me． So I can check their homework everywhere using my computer or telephone．"
The QR codes can be sent to Mr. Guo by email， QQ and WeChat． When Guo scans （扫描） his students' QR codes， their homework appears on his phone． He finds that their homework becomes more creative， with many pictures， music and even videos．
Guo's students like the new way and think it is interesting． "We are living in the information age． Many students like to work with computers， which makes learning more fun．" said Tingting， a student of Guo's．
"The paper is not easy to keep， but the code is easy to keep and share．" Guo said，"It is worth trying to use new technology in education． Education itself is a kind of creation． I don't want my students to fall behind the times．"
However， some parents are worried． They are afraid that their children will spend too much time on computers and less time communicating with teachers． But in fact， it's unnecessary． Students still need to look up information in books and write it down when they do their homework． They only use the code when they hand in their homework， which doesn't take them too much time． Also for teachers， it allows them to check the students' homework at any time． And it's also an easy way to share homework with other students．
（1）According to the passage， students can keep their homework on ．
A． WeChat
B． QQ
C． email
D． blog
（2）Guo's students think the new way is ．
A． strange
B． boring
C． unnecessary
D． interesting
（3）What does the underlined （划线的） word "It" in paragraph 4 mean？
A． The paper is not easy to keep．
B． Keeping and sharing the code easily．
C． Trying to use new technology in education．
D． Education itself is a kind of creation．
（4）Some parents are worried， because they think their children will ．
A． talk with teachers face to face
B． spend too much time on computers or phones
C． not like the new way of handing in homework
D． find the QR codes too difficult to use
（5）What's the main idea of the passage？
A． Teachers needn't check homework any more．
B． Students needn't hand in homework any more．
C． Using QR codes makes checking homework easier．
D． Some parents are worried about their children．
When ice is on the ocean， the polar bears are on the hunt． They are hunting seals．Polar bears need the ice． They can't catch seals as well in the water， where there is no ice．
In summer， some of the sea ice becomes water．Now，however， the sea ice is becoming water earlier than it used to．There is not as much time for the polar bears to hunt for food．They should have enough fat in their bodies to keep them from getting hungry．Some polar bears， however，haven't been able to get enough to eat． By the end of the summer， they are going to die．
Scientists want to learn all they can about polar bears and how they can help them．To help the bears，they have to do tests．It is difficult， however，for scientists to get close to the bears．Scientists fly in a helicopter， over the places where polar bears live．When they notice a bear， they shoot a pointed object at it． The object makes the bear go to sleep．While the bear is asleep，the scientists can do their tests．The most important test is the fat test． If the bear hasn't eaten for two months， it won't have enough fat to live on．
Many people are worried about the ice that is becoming water．Polar bears have to go further and work harder to find food． If the ice keeps becoming water， one day there might not be any polar bears．
（1）The underlined word "hunt" in the first paragraph means： ．
A．搜集
B．游荡
C．狩猎
D．探索
（2）If polar bears want to find food，what do they need？
A． Fat．
B． Ice．
C． A pointed object．
D． Water．
（3）What's the main idea of this passage？
A． Polar bears are in great danger．
B． Polar bears like hunting for seals to eat．
C． It's difficult for scientists to test bears．
D． The ways to help polar bears．
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