阅读下列内容，从每小题所给的四个选项中选出一个最佳答案
You are probably familiar with the saying：An apple a day keeps the doctor away. A recent research carried out by the Chinese University of Hong Kong may change the saying:An apple a day may keep aging away.
The research chose fruit flies(果蝇), as they share many genes(基因)with humans. The fruit flies were either fed normally or had an apple extract(浓缩物) added to their diet.
It turned out that those fruit flies that were given apple extract lived about 55 days—five days longer than the flies that were normally fed. The research group also found it easier for the flies to walk, climb and move about as they aged.
According to the result, the researchers believed that the antioxidants(抗氧化剂) in the apple extract helped clean up dangerous chemicals(化学物质) that cause illnesses, as well as aging.
In another study, researchers examined diets of thousands of women. They discovered that those who regularly ate apples were 20 percent less likely to suffer heart illnesses and stroke.
The apples’ genetic code(遗传密码) was discovered recently. It allows scientists to develop nicer and healthier fruits. Researchers are already using the information to grow a kind of apples full of antioxidants that can keep eyes and joints healthy and protect humans against heart illnesses and cancer.
Apples that kill the desire(欲望) to eat could also be produced, with the first“extra-healthy’’apples on supermarket shelves within just four or five years.
The team that keeps studying apple DNA includes 100 scientists from five countries. Their research also suggests that around 65 million years ago, when dinosaurs began to die off the plant, which would finally become today’s apple tree, experienced a great genetic change. The number of many of its genes doubled. The extra genes allowed the apple to get used to worse conditions and go through a different development from peaches, strawberries and other related fruits.
1.Why were fruit flies used for the research?
A. Because they have a similar diet to humans.
B. Because they have a history as long as apples.
C. Because they feed on nothing but apple extract.
D. Because they share a lot of genes with humans.
2.What result did the researchers find out?
A. Apples produce chemicals that can change human genes.
B. Apples have antioxidants that kill chemicals that cause aging.
C. Apples are rich in vitamins that are needed in humans’ bodies.
D. Apples produce chemicals that make apples taste more delicious.
3.What happened to apples around 65 million years ago according to the research?
A. Their genes stopped their development as the environment got worse.
B. Their genes became twice in number but they finally died off like dinosaurs. [
C. They experienced a great genetic change making them used to worse conditions.
D. They went through a similar development to peaches, strawberries and other related fruits.
4.What can we infer from the passage?
A. Eating apples may bring us more advantages than we might believe before.
B. People who have the habit of eating apples don’t need to see a doctor.
C. Apples that kill the desire to eat are already available in supermarkets now.
D. People will eat apples instead of peaches and strawberries from now on.
阅读下列内容，从每小题所给的四个选项中选出一个最佳答案
Smog is a big problem in many Chinese cities. But it seems that besides wearing a mask, few of us know what has caused the smog and what to do to beat it. Chai Jing, a former news interviewer with CCTV, discussed the questions in her documentary Under the Dome.
The 103-minute film was on websites on Feb 28. In the film, Chai visits polluted places and talks to officials and scientists. She thinks that burning too much coal and oil are the main causes of PM2.5 and smog.
To solve the problem, Chai suggests that we should clean our coal and oil or replace them with cleaner energy such as natural gas. In her film, Chai also emphasized (强调) that everyone can do something to help control smog too. For example, we can live a greener life by using more public transport. Or if we see things that could harm the environment, we can try to stop it. In the film, when she sees a restaurant cooking without any suitable filter facilities (过滤设备), she calls the hotline 12369. The restaurant installed the filter a week later.
Chen Jining, the new minister of environmental protection, praised Chai. “This film encourages ordinary people to take notice of the environment. This is what we need in the future.”
1.What is the main cause of smog according to Chai?
A. Setting off too many fireworks.
B. Burning too much coal and oil.
C. Too many cars in big cities.
D. Too many factories and companies.
2.Which of the following is NOT included in Chai’s suggestions towards reducing smog?
A. Using cleaner energy.
B. Cleaning coal and oil.
C. Using public transport.
D. Replacing coal with wind energy.
3.What can we tell from the story?
A. Only factories produce heavy smog.
B. Only the government can control smog.
C. Smog can’t be controlled by ordinary people.
D. Living a green life can help reduce smog.
4.What’s Chen Jining’s attitude towards Chai’s film?
A. He didn’t watch it. B. He thought highly of it.
C. He disagreed with it. D. He disliked it.
阅读下列内容，从每小题所给的四个选项中选出一个最佳答案
LONDON—Scientists have found an unusual way to prevent our planet from overheating: move it to a cooler spot. All you have to do is to send a few comets (彗星) in the direction of Earth, and its orbit (轨道)will be changed. Our world will then be sent moving into a safer older part of the solar system.
This idea for improving our climate comes from a group of US NASA (美国航空航天局) engineers and American astronomers. They say their plan could add another six billion years to the useful lifetime of our planet—hopefully doubling its working life.
The plan put forward by Dr. Laughlin, and his colleagues Don Korycansky and Fred Adams, needs carefully directing a comet or asteroid (小行星) so that it passes close by our planet and sends some of its gravitational energy (重力势能) to Earth.
“Earth’s orbital speed would increase as a result and we would move to a higher orbit away from the sun,” Laughlin said.
Engineers would then direct their comet so that it passed close to Jupiter(木星) or Saturn (土星). The comet would pick up energy from one of these giant planets. Later its orbit would bring it back to Earth, and the process would be repeated.
In the short term, the plan provides an ideal way to worldwide warming, although the team was actually worried about a much greater danger. The sun is certain to heat up in about a billion years and so “seriously compromise” our biosphere (生物圈)—by cooking us.
That’s why the group decided to try to save Earth.
The plan has one or two worrying sides, however. For a start, space engineers would have to be very careful about how they directed their asteroid or comet towards Earth. The smallest miscalculation (误算)in orbit could fire it straight at Earth—with deadly results.
There is also the question of the moon. As the present issue of Scientific American magazine points out, if Earth was pushed out of its present location, it is “most likely the moon would be stripped (剥离)away from Earth,” it states. This would greatly change our planet’s climate.
1.What makes the scientists plan to move Earth?
A. A few comets are moving to the direction of Earth.
B. Earth’s working life is coming to an end soon.
C. Earth will become too hot for mankind to keep alive.
D. The moon is moving farther and farther away from Earth.
2. If the plan is successful, Earth will have a working life of ________ years.
A. 12 billion B. 6 billion
C. 18 billion D. 24 billion
3.What serious problems might the plan cause according to the passage?
A. The comet might hit Earth and man might lose the moon.
B. Earth might be moved too far away and man might die because of the coldness.
C. The comet might hit Jupiter or Saturn and never return to Earth.
D. Earth’s working life might be greatly shortened.
4.What does the underlined word “compromise” mean?
A. provide B. benefit
C. share D. endanger
阅读下列内容，从每小题所给的四个选项中选出一个最佳答案
Great news! Archaeologists（考古学家） confirm that the tomb found in Xihu township of Yangzhou belongs to Emperor Yang of the Sui Dynasty. Do you know Emperor Yang Guang? He is considered as one of the worst tyrants(君主) who brought the Sui Dynasty to an end in Chinese history. But in fact, he started the construction of the Grand Canal(大运河) to connect the North and the South, making Yangzhou a transportation hub (中心)city.
As we know, Emperor Yang loved Yangzhou very much. Throughout his life, he paid three visits to Yangzhou. On his first tour to Yangzhou, he stayed here for eight months. And the second time, he enjoyed an extravagant lifestyle in Yangzhou. He watched the song and dance shows all day and stayed in Yangzhou for nearly a year. The third time, he enjoyed himself drinking wine without planning to go back to the capital. It lasted for almost one and a half years. In the year AD 618, Emperor Yang was killed by his followers in one of his palaces in Yangzhou, and the Sui Dynasty ended.
Everyone complains that the Sui Dynasty ended because of the Grand Canal. However, it is still an important way for people to travel. In the year AD 605, Emperor Yang ordered the canal to be dug. Digging such a long canal proved to be very difficult. 3.6 million people worked on it and in less than a year many of them lost their lives. When the construction was completed, the journey from the north to the south became more direct. It is the longest canal in the world. It runs from Beijing to Hangzhou, covering a distance of nearly 1,800 kilometres and joining five rivers including the Yellow River and the Yangtze River. Even today, the Grand Canal still plays an important role in travel. Every day, ships go up and down the canal, carrying things between the north and the south.
1.During his life, how long did Emperor Yang stay in Yangzhou in total?
A. One and a half years.
B. Two years and a half.
C. Two years and eight months.
D. Three years and two months.
2.Which of the following is true?
A. Emperor Yang of the Sui Dynasty is considered one of the best tyrants.
B. Emperor Yang was killed by the robbers in one of his palaces in Yangzhou.
C. Everyone complains that the Sui Dynasty ended because of the canal.
D. The canal runs from Beijing to Yangzhou, covering a distance of nearly 1,800 kilometres.
3.The best title should be “______________”.
A. Emperor Yang Guang and the Grand Canal
B. The tomb found in Xihu township of Yangzhou
C. The life of Emperor Yang of the Sui Dynasty
D. The construction of the Grand Canal
阅读短文,从每题所给选项中选出可以填入空白处的最佳选项。
Andi Davise, 49, used to cross the trail through the Phoenix Mountains Preserve with some other hikers before sunrise. This morning, however, she nobody and heard only the sounds of animals.
Some time later, Andi got to the steep slope(陡坡), she climbed up to the top using her hands . When she reached the top, she noticed a dark shape several inches from her left foot. She was and then looked carefully. It was a few seconds she realized that the dog’s eyes were open. A thin, dirty bull dog was looking at her.
She greeted in a soft voice to show she was .The bull dog shook when hearing her voice. Andi inched closer and some water into the dog’s mouth. He tried to stand up but failed.
was wrong with his left front leg. Andi called her husband, Jason, but he didn’t .She knew that if she didn’t carry the dog down the mountain, he would die.She carefully put her arms under the dog’s body. He was so that he fell into her chest. Andi had great trouble going down the steep, rocky mountainside with the 50-pound animal in her arms. her arms and back started aching, she didn’t give up. The trip up had taken 30 minutes going back down took twice that.
Andi’s husband received her messages at last. He and their son, Justin, jumped into the car and drove to Andi quickly.Later that morning, an X-ray that the bull dog was badly hurt, he was likely to lose his left leg.
A few later, the Davises returned to the animal .“The first thing he did was to give me a kiss, after that he went right to my son.” Andi said.
1.A. met B.invited C. phoned D. shouted
2.A. first B. then C. next D. finally
3.A. moved B. excited C. surprised D.energetic
4.A. after B.before C. so D. because
5.A. honest B. modest C. friendly D.curious
6.A. pulled B. dropped C. fell D. pushed
7.A. Something B. Nothing C. Anything D.Everything
8.A. talk B. contact C. speak D. answer
9.A. weak B. sure C. excited D. afraid
10.A. Just B. Ever C. Still D. Even
11.A. where B. when C. while D. however
12.A. pick up B.put up C. wake up D. lift up
13.A. wrote B. said C. showed D. explained
14.A. minutes B. days C. seconds D. moments
15.A. factory B. hospital C. farm D. family
— I think Running Man is the most popular TV game show now.
—_______.
A. I can’t agree more B. That’s all right.
C. Never mind D. I’m glad to hear that
