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随时随地学习
随时随地学习
1、Alice didn’t notice I was coming, her mind ________the work she was doing.
A．was totally fixed on
B．was totally fixing on
C．totally fixed on
D．totally fixing on
2、Researchers are now conducting hibernation experiment and can use chemicals to put living cells into sleep-like state_____ they don’t age.
A. for which B. that
C. where D. which
3、I’d rather you ________ her at the airport tomorrow morning.
A．met
B．meet
C．have met
D．had met
4、_______before we depart the day after tomorrow，we should have a wonderful dinner party.
A．Had they arrived
B．Would they arrive
C．Were they arriving
D．Were they to arrive
5、_______to sunlight for too much time will do harm to one’s skin.
A. Exposed B. Exposing
C. To expose D. Being exposed
6、It is raining so hard.I think Tom is_______to come to our party.
A.impossible B.possible
C.unlikely D.uncertain
7、I have an appointment _______ Dr．Brown，but I need to change it．
A．to B．off
C．with D．from
8、English is a language shared by several diverse cultures, __________ uses it differently.
A. all of which B. each of which
C. all of them D. each of them
9、 all the animals I've ever had, these two dogs are the most sensitive to the spoken word.
A．From
B．Of
C．For
D．With
10、Respect is not one-way traffic but mutual, and that might be we fight back in the trade friction against the USA .
A．where
B．because
C．why
D．how
11、— Did you visit the famous cultural relics last month?
— No, we ________ it, but we spent too much time shopping.
A．could have done
B．must have done
C．can't have done
D．shouldn't have done
12、 Carbon dioxide, which makes a ________ between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.
A．difference B．comparison
C．connection D．barrier
13、They are good friends. ___________ is no wonder that they know each other so well.
A. This B. That C. There D. It
14、 the help of our teachers, we the problem.
A. Under; took no trouble in solving B. In; had no trouble at solving
C. On; kept to troubles to solve D. With; had no difficulty solving
15、During Voldemort’s(伏地魔的）time in power, people live in ________ fear that they will be killed, either for having impure blood or for having pity for those who do.
A.constant B.chief C.secure D.vast
16、I feel it is your husband who _________ for the spoiled child.
A. is to blame B. is going to blame
C. is to be blamed D. should blame
17、I’d like to________the challenge without arguing.
A.take up B.take on C.take off D.take over
18、Seeing the looks on their faces，we can't really imagine what they are________.
A．going by
B．going up
C．going through
D．going on
19、Don’t respond to any e-mails _____ personal information, no matter how official they look.
A．requesting
B．observing
C．replacing
D．inspiring
20、— think our city should carry out Trash-sorting rules like Shanghai
—___________. Trash-sorting has a lot of advantages.
A.My pleasure B.You have a point C.I have no idea D.Don't bother
21、 Take a road trip from Wisconsin up through Northern Minnesota. Look out your window and watch as maple-oak forests gradually give way to plant species like aspens, spruce and birch. This changing view occurs because Northern Minnesota sits between temperate(温带的) forests in the southern US and boreal forests(北方针叶林) to the north. It makes the region an ideal place to track the impact of a warming climate.
Scientists have guessed that, as global temperatures rise, plant species of both temperate and boreal forests will move northwards to escape warmer conditions. To test this guess, researchers have been artificially heating 18 small forest plots in the transition zone of Northern Minnesota ever since 2012. Using covers and heaters, the team increased air and soil temperatures. The long-term experiment is now offering valuable insights into how our changing climate will affect the structure and ecosystems of boreal and temperate forests.
The team found that boreal species, such as balsam fir and white spruce, are less able to emerge and survive under warmer conditions. They measured the boreal forests species’ amount of photosynthesis(光合作用) taking place. Their results show that, as soils dry up in warmer conditions, boreal species reduce their photosynthetic rate, reducing the amount of organic matter available for growth. Overall, the seedling species richness in the temperate-boreal forest transition was reduced by warming. The researchers suggest that, unless the temperate species can offset the loss of the boreal species, the overall biodiversity of these forests is likely to decline.
This research is important because temperate and boreal forests contain46 percent of all trees on earth. Of the global carbon stock stored by forests, boreal forests contain 32 percent, temperate forests 14 percent. In the coming years, boreal forests will experience extreme increases in air and soil temperatures. An increase of 1.5°C has already been measured, with a rise of between 4°C and 6°C projected in the next century.
【1】What made researchers choose Northern Minnesota to perform their experiment?
A．Its rich plant species.
B．Its easy accessibility.
C．Its special location.
D．Its warm climate.
【2】What does the long-term experiment focus on?
A．The causes of decreasing forest areas.
B．The influence of human activities on climate change.
C．The changes of forests driven by rising temperatures.
D．The decline in the biodiversity of temperate and boreal forests.
【3】What does the underlined word in Paragraph 3 mean?
A．Lead to.
B．Slow down.
C．Add up to.
D．Make up for.
【4】The statistics in the last paragraph show that temperate and boreal forests ________.
A．absorb less carbon dioxide per square meter
B．face a high risk of being hit harder in the future
C．play an important role in fighting climate change
D．have drawn public attention to environmental protection
22、In 1943, when I was 4, my parents moved from Coeur d'Alene, Idaho, to Fairbanks, Alaska, where adventure was never very far away.
We arrived in the summer, just in time to enjoy the midnight sun. All that sunlight was fantastic for Mom's vegetable garden. Working in the garden at midnight tended to throw her timing off, so she didn't care much about my bedtime.
Dad was a Railway Express agent and Mom was his clerk. That left me in a mess. I usually managed to find some trouble to get into. Once I had a little fire going in the dirt basement of a hotel. I had tried to light a barrel (桶) of paint but couldn't really get a good fire going. The smoke got pretty bad, though, and when I made my exit, a crowd and the police were there to greet me. The policemen took my matches and drove me home.
Mom and Dad were occupied/busy in the garden and Dad told the police to keep me, and they did! I had a tour of the prison before Mom rescued me. 1 hadn't turned 5 yet.
As I entered kindergarten, the serious cold began to set in. Would it surprise you to know that I soon left part of my tongue on a metal handrail(栏杆) at school?
As for Leonhard Seppala, famous as a dog sledder (驾雪橇者), I think I knew him well because I was taken for a ride with his white dog team one Sunday. At the time I didn't realize what a superstar he was, but I do remember the ride well. I was wrapped heavily and well sheltered (保护) from the freezing and blowing weather.
In 1950, we moved back to Coeur d'Alene, but we got one more Alaskan adventure when Leonhard invited us eight years later by paying a visit to Idaho to attend a gathering of former neighbors of Alaska.
【1】 What can be inferred about the author's family?
A. His father was a cruel man.
B. His parents didn't love him.
C. His mother didn't have any jobs.
D. His parents used to be very busy.
【2】What happened when the author was 4?
A. He learned to smoke.
B. He was locked in a basement.
C. He was arrested（拘捕） by the police.
D. He nearly caused a fire accident.
【3】Which of the following is true?
A. Leonhard was good at driving dog sleds.
B. The author spent his whole childhood in Alaska.
C. Leonhard often visited the author's family after 1950.
D. The author suffered a lot while taking the dog sled in Alaska.
【4】What is the author's purpose of writing the text?
A. To describe the extreme weather of Alaska.
B. To look back on his childhood with adventures.
C. To express how much he misses Leonhard.
D. To show off his pride in making trouble.
23、The Amazon basin region is home to about 2.5 million insect species, tens of thousands of plants, and some 2,000 birds and mammal is. To date, at least 40,000 plant species, 3,000 fish, 1,294 birds, 427mammals, 428 amphibians, and 378 reptiles have been scientifically classified in the region. One in five of all the birds in the world live in the Amazon rainforest.
The warm and wet forest has been in existence for at least 55 million years, and thrived even during glacial periods, allowing for the evolution of an unbelievable diversity of species. Radiocarbon dating has revealed trees of 10 centimeter in diameter to be more than 300 years old, and some trees over 1,000 years old, indicating that untouched forests can experience unbelievable longevity.
The first human inhabitants are thought to have settled in the Amazon region about 11,200 years ago. European explorers arrived in the 16th century, bringing diseases which traveled faster than the explorers themselves, killing perhaps as many as 90% of the indigenous inhabitants. By the late 17th century the Amazon basin was controlled by Portuguese and Spanish explorers.
The Amazon rainforest has been described as the lungs of our planet because of its important role in recycling carbon dioxide into oxygen. But due to deforestation, rainforests now coverless than 5% of the Earth's land surface, and experts believe that this is a big contributor to global climate change. Severe deforestation began in the 20th century, with 587,000 square kilometers lost up to the year 2000. Most deforested land is used for grassland to raise farm animals and agriculture. The addition of transport routes has led to increased settlement and deforestation, and at the present rate, scientists estimate that the Amazon rainforest will be reduced by 40% in two decades.
【1】Why are the figures mentioned in Paragraph 1?
A．To prove the forest untouched.
B．To classify species scientifically.
C．To show the diversity of species.
D．To attract more attention to the Amazon region.
【2】Why did most indigenous inhabitants in the Amazon region die?
A．Because European explorers brought diseases there.
B．Because Portuguese explorers treated them badly.
C．Because a lot of trees were cut down and burned.
D．Because they got killed by Spanish explorers.
【3】What can be inferred about the Amazon rainforest?
A．It has the largest number of species.
B．It covers over 5% of South America.
C．It is becoming larger in area.
D．It is being endangered now.
【4】What may be included in the following paragraph?
A．Examples of destroying forests.
B．Measures to protect rainforests.
C．New settlements in the Amazon region.
D．Ways to stop global warming.
24、Ayla Bashir, a 16-month-old girl from Ottowa, Canada, is healthy after doctors used a new method to treat her before she was born. Her mother, Sobia Qureshi, recently told The Associated Press her daughter is now an active, happy girl who is growing normally. And her parents previously lost two daughters, Zara, 2.5, and Sara, 8 months, to the condition.
Ayla has a rare genetic disease called Pompe, which causes the body to fail to make some or all of an important enzyme (酶). But a new case study describes the new treatment method that seems to be working for Ayla.
Dr. Karen Fung-Kee-Fung, a medicine specialist who works with fetuses (胎儿), gave Ayla the treatment which was developed by Dr. Tippi MacKenzie, co-director of the Center for Maternal-Fetal Precision Medicine at the University of California, San Francisco.
MacKenzie shared her research with Fung-Kee-Fung. “We were all motivated to make this happen for this family,” MacKenzie said.
Ayla received six treatments, starting at about 24 weeks of fetal (胎儿的) development. And Dr. Pranesh Chakraborty has cared for Ayla’s family for years. He told the AP that what made the treatment highly effective was completing it early, while the fetus was still developing.
Pompe affects fewer than 1 in 100，000 newborns. It is caused by changes in a gene that makes an enzyme that breaks down glycogen, or stored sugar, in cells. When that enzyme is reduced or removed, glycogen (肝糖元) builds up dangerously throughout the body.
Babies with Pompe disease have trouble feeding and experience muscle weakness. They often have very enlarged hearts. When left untreated, most babies die from heart or breathing problems during the first year of life. In addition to the girls who died, Ayla’s parents have a 13-year-old son and a five-year-old daughter. Neither of those children were affected by the disorder.
For now, doctors are waiting to see whether the treatment can become a generally accepted form of treatment. Dr. Christina Lam, a biochemical genetics specialist at the University of Washington and Seattle Children’s Hospital in Seattle, said it will take some time to clearly demonstrate whether the results of the new treatment are better for patients.
Ayla receives drugs for her immune system and weekly enzyme treatments that take five to six hours. Unless a new method is found, Ayla is likely to continue the treatments throughout her life.
【1】According to the passage, which of the following statements is true?
A．Ayla is now an active, happy girl who is growing normally and there is no need to continue the treatment.
B．If Ayla had not been treated before she was born, she might not survive now.
C．Babies with Pompe disease often die from heart and breathing problems and have enlarged stomach.
D．Besides Ayla, Sobia Qureshi has a 13-year-old son and a five-year-old daughter with the same disease, Pompe.
【2】Why the enzyme mentioned in this passage is important to people?
A．Because it plays an important part in producing blood.
B．Because it can help the glycogen build up throughout the body.
C．Because it can store the sugar in cells, which is beneficial to people’s immune system.
D．Because it can make the glycogen separate into parts.
【3】What can we infer from the passage?
A．Dr. Karen Fung-Kee-Fung, who developed the new method, gave Ayla the treatment.
B．In Dr. Christina Lam’s opinion, the treatment has proved to be effective in curing the disease.
C．When the fetus is completely developed, the treatment can be highly effective.
D．Ayla has to receive enzyme treatments every week and keep taking drugs in order to keep health.
【4】What is the best title of the passage?
A．For first time, doctors treat deadly disease before birth
B．A brave girl fights against a rare genetic disease
C．The unlucky couple gain their confidence in life
D．Doctors discovered a new important enzyme
25、 Morgan Anderson, who was terrified of flying, had forgotten entirely that she was on a plane. She and her mother, Rose Anderson, were busy doing something more important ______ a man.
On Dec. 13, Morgan and her mother were in the air on their way to Salt Lake City when an ______ over the plane’s public address system said the stewardess was ______ medical professionals aboard to help with an emergency. Rose heard the call and pushed Morgan, who had fallen asleep. Both of them were ______, so they had a job to do.
The ______ went to the front of the airplane, where they found a man who appeared to be in his 60s. He was senseless and looked very ______. He was in worse condition than either Rose or Morgan had ______.
Rose has more than 30 years of ______ in nursing while Morgan just ______ from a medical school, so Rose took the ______. Following her mother ’s instructions, Morgan began to list the airplane’s medical supplies which were ______ in saving the man’s life.
Thanks to Rose and Morgan’s efforts, the man ______ to life. He told Rose and Morgan, who continued to care for him ______ the plane landed, that he was on his way to visiting his mother. The man was in a stable condition when paramedics (护理人员) ______ the case after they landed.
The captain of the airplane expressed his ______ to the Andersons and gave them a discount off their next flight. “It’s always good to have a happy ending” Rose said.
The medical emergency also provided Morgan with an opportunity to ______ what she had learnt at school to practice. Morgan said she appreciated the chance of being ______ to others.
Rose was always ______ and willing to help people in need. Greatly influenced by her mother, Morgan，who once dreamt of being an architect, ______ her mind. According to Morgan，it was her mother who ______ Morgan to step into the nursing field.
【1】A.rescuing B.adopting C.comforting D.protecting
【2】A.explanation B.expression C.announcement D.advertisement
【3】A.in honor of B.in case of C.in charge of D.in need of
【4】A.nurses B.pilots C.patients. D.passengers
【5】A.illegally B.immediately C.actually D.wisely
【6】A.anxious B.pale. C.delighted D.exhausted
【7】A.displayed B.noticed C.suffered D.expected
【8】A.training B.exploration C.experience D.reputation .
【9】A.graduated B.moved C.dated D.resulted
【10】A.lead B.test C.pill D.parcel
【11】A.flexible B.acceptable. C.necessary D.adjustable
【12】A.came out B.came in C.came over D.came back
【13】A.until B.unless. C.after D.if
【14】A.took off B.took over C.took in D.took down
【15】A.greetings B.thanks C.demand D.relief
【16】A.compare B.expose C.add D.apply
【17】A.gentle B.charming C.vital D.polite
【18】A.narrow-minded B.cold-hearted C.simple-minded D.kind-hearted
【19】A.changed B.opened C.lost D.calmed
【20】A.forced B.caused. C.inspired. D.warned
26、假定你叫李华，作为一名学生会主席，你发邮件邀请美国老师Peter来学校讲一堂课，并告诉他准备以下内容。
内容包括：
1. 自我介绍；
2. 对两国中学教育理念和方式的异同进行比较；
3. 谈谈对学校的印象。
注意：1. 词数100左右；
2. 可适当增加细节，以使行文连贯。
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