1、 They were walking along the shore ______ a huge wave appeared out of nowhere, sweeping
them out to sea.
A. as B. while C. when D. though
2、The inner strength of the girl allows her _____ going when she gets into trouble.
A. keep B. keeping C. to keep D. kept
3、None of the medicine I took ________ effective, but eating sensibly and exercising regularly ________ now my “personal” ways to boost immunity against flu.
A．was…is
B．were…is
C．was…are
D．were…are
4、Though we lived in the same neighborhood for many years, I had never made
his , let alone known where he worked.
A. acquaintance B. investigation
C. significance D. recognition
5、They said the greatest virtues in a politician were ________, correctness and honesty.
A．concept
B．deposit
C．evolution
D．integrity
6、Behind a successful man there is,______, a woman who makes this success possible.
A. more often than not B. hardly ever
C. almost never D. nowhere near
7、The managers discussed the plan that they would like to see___________ the next year.
A．carry out
B．carrying out
C．carried out
D．to carry out
8、I would rather at home to the cinema.
A. watch TV, than go B. to watch TV, than go
C. watch TV, than going D. to watch TV, than going
9、Today he came earlier than __________, for it was not a(n) ______ day.
A.common; usual B.ordinary; normal
C.normal; ordinary D.usual; ordinary
10、The colors on the national flags can be ________ differently in different cultures, but they have one thing in common, that is, each of the colors was carefully chosen.
A．translated
B．printed
C．represented
D．interpreted
11、The living room is clean and tidy, with a dining table already __________ for a meal to be cooked.
A．laid
B．laying
C．to lay
D．being laid
12、Have you read all the information that this case?
A.relate B.relate to C.relates to D.relates
13、______ Jack Ma has stepped down as chairman of Alibaba, he still remains on its board of directors.
A. Since B. Before
C. While D. Until
14、What is the correct phonetic symbol for the word embarrassed?
A.[əm'bæəst] B.[ɪm'bærəst] C.[ɑːm'bærəst] D.[em'bærəst]
15、-- Can I call you back at two o'clock this afternoon?
-- I'm sorry, but by then I ____ to Beijing. How about five?
A. fly B. will fly
C. will be flying D. am flying
16、He hasn’t got any hobbies—________ you call watching TV a hobby.
A．if
B．as long as
C．unless
D．although
17、—What do you think of Tim?
—He appears a kind person. I don’t like him ________.
A. even so B. even though
C. though D. yet
18、— Kathy, remember how you lost your diamond?
— Sorry, my memory is completely _____now.
A. cautious B. specific C. blank D. accurate
19、 cars on our roads rose dramatically last year.
A. A great deal of B. An amount of
C. The number of D. A number of
20、A package of measures has been introduced to help the economy and ______ jobs.
A.preview B.preserve C.prevent D.predict
21、 In 2015, astronaut Scott Kelly made himself a guinea pig for NASA's "twins study," designed to see what spaceflight does to the human body. It was for all the people who dream of human journeys to Mars and other destinations in space. Kelly rode a rocket into space and spent nearly a year on the International Space Station in low Earth orbit, while his identical twin brother, Mark Kelly, served as the comparison subject and stayed on Earth's surface.
The full results, published Thursday in the journal Science, showed that Scott Kelly experienced numerous physiological and chromosomal（染色体的）changes during his long stay in orbit, including changes in gene expression. His immune system went on high alert, both when he went to space and upon returning to Earth. His body acted as if it were under attack.
One of the most dramatic findings concerned epigenetics（实验胚胎学） — how genes are turned on or off to produce proteins. Gene expression changed in both Kellys during the study but in significantly different ways. The study found that more than 90 percent of Scott Kelly's gene expression changes returned to normal when he landed on the surface. His telomeres（染色体端粒）, structures which break over time as part of the natural aging process, lengthened in space. But that didn't necessarily mean being younger, the study found, because most telomeres shortened dramatically when he returned to Earth.
Months later, tests showed that slight changes in telomeres length still remained and left some influence on Scott Kelly, which means he and his brother are no longer identical twins. "He might be at some increased risk for cardiovascular disease or some types of cancer," said Susan Bailey, a biologist at Colorado State University who led one of the investigations in the study.
However, the researchers, echoing what NASA has suggested previously, said the twins study turned up no showstoppers — no shocking health consequences that would surely prevent a human mission to Mars or similar long-duration mission.
【1】What does the underlined expression "a guinea pig" in Paragraph 1 mean?
A.a person who is strong enough to become an astronaut.
B.a person who is a leader of space exploration.
C.a person who is picked out for a scientific experiment.
D.a person who is faced with the harsh effects of space flight.
【2】What happens to an astronaut's body during a space flight?
A.The permanent changes in gene expression. B.The aging of cells.
C.The lengthened telomeres. D.The failure in immune system.
【3】What can we learn from the passage?
A.Scott Kelly will appear younger because his telomeres lengthened in space.
B.A long-duration spaceflight will be banned because of the damage to health.
C.Scott Kelly's gene expression changes were normal when he returned to the surface.
D.Scott Kelly might be more likely to develop cardiovascular disease or some types of cancer.
【4】What can be a suitable title for the text?
A.Gene expression: Physiological Change of Proteins.
B.Space Experiment: Changes in Both Kellys.
C.Mars Exploration: an Unstoppable Human Mission.
D.Shortened Telomeres: the Killer of Astronauts.
22、 Many years ago, people relied on the sun, the moon and stars to find their way around. Later, the compass was introduced. And now, we have satnav（卫星导航）systems to guide us. A satnav system uses groups of satellites to show the user’s location. They send information to a receiver, such as a smartphone, to show us where we are.
The earliest built satnav system is the Global Positioning Satellite System, which belongs to the US. Then there is Russia’s Global Navigation Satellite system，the European Union’s Galileo and China’s own satellite navigation system, Beidou.
On October 18, 2017, an ARJ21-700 plane, which was the first domestically（国内地） produced jet equipped with the Beidou navigation system, successfully completed a test flight. The results showed the performance of the system developed by China matches that of similar systems produced abroad, according to the Commercial Aircraft Corporation of China.
Since its introduction in 2000, the Beidou navigation system has been increasing numbers of applications linked to everyday life, from shared bikes to farming.
When it comes to shared bikes, smart locks that support Beidou chips offer more accurate positioning than others, making it easier to find a bike.
Farmers can use Beidou-enabled tractors to plow（犁）the soil and use unmanned aircraft with Beidou to sow seeds, which can improve efficiency and make better use of resources. Beidou’s farming applications have spread from Heilongjiang Province to Beijing, Liaoning, Shanxi, Hubei and other regions across China.
With its many uses, the Beidou navigation system is even playing a big role in the Belt and Road Initiative（一带一路）. “To date, the Beidou system has covered most parts of the Asia-Pacific region, as well as countries along the Silk Road Economic Belt and the 21st Century Maritime Silk Road,” said Yang Changfeng, chief designer of the Beidou system.
Today, there are more than 20 Beidou satellites above our heads, and China plans to launch even more this year to expand the Beidou network to better serve the Belt and Road Initiative.
“As Beidou expands its overseas reach, it will be increasingly popular in the logistics（物流） industry,” said Miao Qianjun, Secretary General of the navigation services association. “Ships, for example, can use it to position themselves while sailing across oceans to European countries, no longer limited to Southeast Asian regions in the near future.
【1】What is the purpose of the first two paragraphs?
A. To compare some modern satnav systems.
B. To describe the benefits of satnav systems.
C. To tell us how satnav systems were created.
D. To introduce some satnav systems and their functions.
【2】What can we know about the Beidou navigation system according to the article?
A. It was used successfully in a new jet plane.
B. It is more powerful than other satnav systems.
C. It was introduced to China on October, 2017.
D. It wasn’t used in our everyday life until recently.
【3】According to the article, the Beidou navigation system is already widely used for _______.
A. plowing the soil and sowing seeds
B. improving the efficiency of network
C. producing more smart locks for shared bikes
D. navigating ships across oceans to European countries
【4】What is Miao Qianjun’s attitude toward the future of the Beidou system?
A. Worried. B. Casual.
C. Positive. D. Doubtful.
23、For humans, ignorance (无知) is inevitable (不可避免的) : It's our natural state. There's too much complexity in the world for any individual to master. Ignorance can be frustrating, but the problem is not ignorance itself.【1】 .
According to David Dunning, ignorant people don't know how ignorant they are. If you give a group of people a task to do and then ask them how well they think they've done on the task. Poor performers overestimate how well they've done; strong performers often underestimate their performance: This is because those who lack skills also lack the knowledge of what skills they're missing. 【2】 Those who have skills know what skills they could improve on.
Our ignorance, in general, shapes our lives in ways we do not know about. Put simply, people tend to do what they know and fail to do what they don't know. 【3】 People fail to reach their potential simply because they are not aware of the possible.
This is a fact of life. 【4】 We won't miss Disneyland if we don't know it's there. For many expensive things, the less you know about them, the less you'll miss them and the happier you'll be.
【5】 If we don't know about birth control, then we won't use it. If we remain ignorant about the horrors that are going on next door, we won't do what's necessary to stop them. And if we are ignorant about the dangerous things our children are getting into, disaster can follow.
A．Ignorance means you have neither.
B．So they think they're pretty good.
C．It’s the trouble we get into by not recognizing it.
D．But ignorance has costs.
E．It's knowledge of possibilities that makes us miss them.
F．We can't choose what we don't know about.
G．In that way, ignorance channels the course we take in life.
24、An absolute description of the threat hanging over the world's mammals,reptiles,amphibians and other life forms has been published by the well-known scientific journal,Nature.A special analysis carried out by the journal indicates that an astonishing 41% of all amphibians on the planet now face extinction while 26% of mammal species and 13% of birds are similarly threatened.
Many species are already critically endangered and close to extinction,including the Sumatran elephant,Amur leopard and mountain gorilla.But also in danger of vanishing（消失）for the wild,it now appears,are animals that are currently rated as merely being endangered.
In each case,the finger of blame points directly at human activities.The continuing spread of agriculture is destroying millions of hectares of wild habitats every year,leaving animals without homes,while the introduction of newly-come species,often helped by humans,is also damaging native populations.At the same time,pollution and overfishing are destroying ocean ecosystems.
"Habitat destruction,pollution or overfishing either kill off wild creatures and plants or leaves them badly weakened," said Derek Tittensor,an ocean ecologist at the World Conservation Monitoring Centre in Cambridge. "The trouble is that in coming decades,the additional threat of worsening climate change will become more and more common and could then kill off these survivors."
The problem,according to Nature,is worsened because of the huge gaps in scientists knowledge about the planet's biodiversity.Evaluations of the total number of species of animals and plants alive vary from 2 million to 50 million.In addition,evaluations of current rates of species' disappearances vary from 500 to 36,000 a year. "That is the real problem we face," added Tittensor. "The scale of uncertainty is huge."
In the end,however,the data indicate that the world is heading cruelly towards a mass extinction-which is defined as one involving a loss of 75% of species or more.This could arrive in less than a hundred years or could take a thousand,depending on extinction rates.
【1】What's the main idea of the first two paragraphs?
A. Figures about some wild animals are astonishing.
B. Nature is the famous journal around the world.
C. Many endangered species are close to extinction.
D. Some rare species have appeared around the world.
【2】From paragraph 4 we know that another future threat is .
A. destruction of habitats B. overfishing and pollution
C. the worsening climate change D. killing off wild creatures and plants
【3】What is the real problem we are facing now according to paragraph 5?
A. The killing of wild creatures and cutting of trees.
B. The global warming caused by human beings.
C. The destruction of ocean ecosystem by pollution.
D. Evaluation of current rates of species' disappearances.
【4】What does "This" in the last sentence refer to?
A. mass extinction. B. extinction rates.
C. extinction time. D. 75% of species or more.
25、When I was 25 years old, I had a big dream in my mind. I wanted to travel around Africa with my _______. So I left my hometown with great confidence and arrived in Cape Town, not really _______ what to do next._______, before my trip actually started, I met a kind, old Nigerian man. He gave me the best travel tips I had ever received. “Be like a(n) _______ on your way around the world.”
It sounded _______, but it really changed my idea about travelling. He helped me _______ that travel is about learning and observing local _______. It’s far too easy to go into a new country and believe your ways are better. “But if you study, ask questions, and try to _______ the locals, you’ll have far richer _______.” he promised me.
On other vacations, ________ I was on my tour way to Cancun, I was ________ a tourist. I only stayed there for a week to see the sights and place of interest and then left. The culture didn’t ________ me. I left the cities and towns without really knowing a anyone or anything that existed (存在) in those places to which I had paid a visit.
This time, I promised to myself that I would a ________ traveler. After seven months of ________ backpacking in Africa from Cape Town to Cairo, I realized that having a student-like mindset (观念模式) helped extend my trip and helped me learn a lot, which ________ me more than any other trips ever did to me.
【1】
A．backpack
B．parents
C．friend
D．pet
【2】
A．happy
B．sure
C．worried
D．excited
【3】
A．Angrily
B．Sadly
C．Certainly
D．Luckily
【4】
A．teacher
B．player
C．actor
D．student
【5】
A．simple
B．perfect
C．foolish
D．boring
【6】
A．promise
B．forget
C．realize
D．notice
【7】
A．events
B．houses
C．mountains
D．cultures
【8】
A．put down
B．point to
C．learn from
D．hear of
【9】
A．dreams
B．experience
C．tasks
D．practice
【10】
A．since
B．after
C．before
D．when
【11】
A．just
B．already
C．quite
D．hurt
【12】
A．welcome
B．change
C．respect
D．even
【13】
A．real
B．hopeful
C．lovely
D．healthy
【14】
A．successfully
B．suddenly
C．politely
D．hurriedly
【15】
A．warned
B．satisfied
C．frightened
D．understood
26、请阅读下面这则寓言，并按照要求用英语写一篇80词左右的review。
相关词汇：crow (乌鸦)
Why don’t you drink water as the book told us?
Crows Drink Water
There was only a little water in a bottle which had a long and narrow neck. A fat crow came to the bottle and drank the water by a straw. He was enjoying the water when another thirsty crow went by. Accustomed (习惯于) to the way of drinking water taught in books, the thirsty crow was very surprised. He asked the fat crow, “Why don’t you drink water as the book told us?” The fat crow replied,“Because this method can make me drink water faster.”