阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
Human cloning is expected to be ______1._______ (benefit) to mankind in many ways, although some people object to ______2.______ (carry) out human cloning research. Below is a list that is far from completion.
Dr. Richard Seed, one of the leading _______3._______ (support) of human cloning technology, indicates that it may someday be possible to reverse(颠倒) the aging process because of what we learn from cloning.
Scientists, who are also in _____4._______ of human cloning technology, believe that heart attack victims may get treated ______5.________ (appropriate) if their healthy heart cells are cloned and then injected into the areas of the heart that have been damaged.
______6.________, there has been a breakthrough _______7.______ human stem cells. Embryonic(胚胎的) stem cells can be grown to produce organs to repair or replace damaged _______8._______. By combining this technology with human cloning technology it may be possible to produce needed organs for suffering people _______9._______ will be free of rejection by their immune systems. Conditions such as Alzheimer’s disease, Parkinson’s disease, diabetes, heart failure, and other problems may _______10._______ (cure) if human cloning and its technology are not banned.
完形填空
阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
I’m a wheelchair user. However, I’m not wheelchair-bound, or ______ to my wheelchair. My disability has not made me ________ or admirable, or deserving a pat on the head ______ you can reach it. As a matter of fact, I _______having my head patted.
I have total feeling in all limbs(四肢), so when you said, “You ______ didn’t feel that”, rather than _______ for kicking me, you were wrong. I don’t have ______ shoulders from pushing a wheelchair: my shoulders were born weak for that very reason.
Waiting at bus stops, I’m a passive ______ for those who incorrectly assume my experience with the health care system and create a(n) ________ in your last doctor’s appointment, or what ______ to the lady who lives down your street.
If given the _______, I’m really good at putting people at ease. My communication with this able-bodied world depends on it. I can’t ______ without the help of others, but it works best for everyone if I can _______ when and how it is offered. If you are not sure whether you are going to offer to help, just ask, and don’t be _____ if the answer is no.
If I make you feel uncomfortable, please _______ that you would manage to live as I do. There is no other choice. Please don’t pass on your _________ to children by pushing them for staring, or wanting to touch and ________ my wheelchair.
I’m sorry if I don’t remember your name or the occasion we met — there are more ________ adults in my life than wheelchair users in your life. And the answers to the questions are: my ________ chores(家庭杂务) are done on my own; and yes I can, and I do, as often as opportunity ________.
1.A. connected B. tied C. linked D. submitted
2.A. stubborn B. courageous C. impressive D. depressed
3.A. when B. unless C. because D. though
4.A. appreciate B. hate C. risk D. consider
5.A. occasionally B. slightly C. probably D. hopefully
6.A. apologizing B. accounting C. paying D. calling
7.A. sick B. strong C. unfit D. broad
8.A. passenger B. speaker C. listener D. passer-by
9.A. surprise B. problem C. guess D. interest
10.A. happened B. turned C. approached D. came
11.A. permission B. confidence C. privilege D. chance
12.A. get by B. go off C. give in D. put up
13.A. predict B. estimate C. guide D. learn
14.A. offended B. frightened C. stressed D. regretted
15.A. wonder B. admit C. realize D. forget
16.A. worry B. discomfort C. disappointment D. sadness
17.A. admire B. explore C. stop D. watch
18.A. healthy B. happy C. helpful D. successful
19.A. daily B. ordinary C. universal D. common
20.A. appears B. matters C. fails D. allows
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
When it comes to the benefit of volunteering, a lot of people think it’s all about the warm feeling after helping someone. ___1.___ As is known, charity work requires a wide variety of people to do a wide variety of things for everything to work. It means that there are some surprising benefits for volunteers. For example, volunteering:
*Teaches you new skills
From helping make websites to teaching immigrant kids your native language, or to arranging events for charity, volunteering can really be almost anything. It means that when you get involved in charity work, a lot of the time you will face challenges. ___2.___
*Can teach you what truly matters
It’s a great way to find new perspectives on life. When you’ve been at it for a while, you just might find yourself re-evaluating your advantages. ___3.__ One of my friends went from wanting to be a lawyer to discovering a true passion for teaching.
*___4.___
Maybe it’s not so surprising, but what might surprise you is how genuine these friends are. Some of my long-term friends are people I’ve met through volunteering. I’m not the kind of guy that makes friends for connections, but sometimes it’s very convenient to have a broad network.
Summed up in one line: Volunteering helps you grow. ___5.___ You meet a very wide variety of people you don’t have a lot in common with. You learn to get along with people involved in many different walks in life. You learn to know what you are to do. So if you’ve ever considered volunteering, what are you waiting for?
A. Helps you make new friends.
B. Can help improve social skills.
C. You might even decide on a completely new path to take in life.
D. As it turns out, that’s far from the only benefit.
E. Volunteering helps you look outside yourself and your problems.
F. Through overcoming the challenges you learn completely new skills.
G. Not only as a person but it helps you develop your skill set as well.
Sharks have lived in the oceans for over 450 million years. There are now about 360 species of sharks, whose size, behavior, and other characteristics differ widely.
Sharks range in size from the 0.1 meter long dwarf-dog shark to the 18-metre long whale shark — the world’s biggest fish. The whale shark, like two other large shark species — the basking shark and the megamouth shark — are harmless to people because they feed on plants and small aquatic animals.
Sharks have extremely sensitive sense organs. Some sharks can detect the scent(气味) of decaying fish or blood even when it is diluted(稀释) to only one part per million parts of seawater. They can probably hear underwater sounds that originate as far as 3 kilometers away and can tell the direction from which underwater sounds are coming.
Sharks are key predators(肉食动物) in the world’s oceans, helping control the numbers of many other ocean predators. Without sharks, the oceans would be overcrowded with dead and dying fish.
Every year, we catch and kill over 100 million sharks, mostly for food and for their fins. Dried shark fins are used to make shark fin soup, which makes a profit for the sellers. Other sharks are killed for sport and out of fear. Sharks are vulnerable to overfishing because it takes most species 10 to 15 years to begin reproducing and they produce only a few offspring.
Influenced by movies and popular novels, most people see sharks as people-eating monsters. This is far from the truth. Every year, a few types of sharks injure about 100 people worldwide and kill about 25. Most attacks are by great white sharks, which often feed on sea lions and other marine mammals. They sometimes mistake human swimmers for their normal prey, especially if they are wearing black wet suits.
If you are a typical ocean-goer, your chances of being killed by an unprovoked(无缘无故的) attack by a shark are about 1 in 100 million. You are more likely to be killed by a pig than by a shark.
Sharks help save human lives. In addition to providing people with food, they are helping us learn how to fight cancer, bacteria and viruses. Sharks are very healthy and have aging processes similar to ours. Their highly effective immune system allows wounds to heal quickly without becoming infected, and their blood is being studied in connection with AIDS research.
Sharks are among the few animals in the world that almost never get cancer and eye cataracts. Understanding why can help us improve human health. Chemicals extracted from shark cartilage(软骨) have killed cancerous tumors in laboratory animals, and these chemicals may someday help prolong our life.
Sharks are needed in the world’s ocean ecosystems. Although they don’t need us, we need them. We are much more dangerous to sharks than they are to us. For every shark that bites a person, we kill one million sharks.
1.Which statement best expresses the main idea of the article?
A. There are many different species of sharks, but only a few of them are dangerous to humans.
B. Sharks are important to the ocean ecosystem and they are a valuable resource for humans.
C. Although some sharks are dangerous to humans, they can help save human lives.
D. Sharks always eat small fishes and they are an essential part of the world’s oceans.
2.Which question is NOT answered in the article?
A. How long does a shark live?
B. How many people are killed by sharks each year?
C. Why are sharks important in medical research?
D. What do humans kill sharks for?
3.It can be inferred from the passage that ______________.
A. movies have given people the wrong impression of sharks
B. most sharks are dangerous to humans
C. sharks will attack anyone who is wearing black
D. it is very likely that ocean-goers will be killed by a shark
A world-famous Canadian author, Margaret Atwood, has created the world’s first long-distance signing device, the LongPen.
After many tiring book signings from city to city, Atwood thought there must be a better way to do them. She hired some technical experts and started her own company in 2004. Together they designed the LongPen. Here’s how it works: The author writes a personal message and signature on a computer tablet(手写板) using a special pen. On the receiving end, in another city, a robotic arm fitted with a regular pen signs the book. The author and fan can talk with each other via webcams(网络摄像机) and computer screens.
Work on the LongPen began in Atwood’s basement(地下室). At first, they had no idea it would be as hard as it turned out to be. The device went through several versions, including one that actually had smoke coming out of it. The investing finally completed, test runs were made in Ottawa, and the LongPen was officially launched at the 2006 London Book Fair. From here, Atwood conducted two transatlantic book signings of her latest book for fans in Toronto and New York City.
The LongPen produces a unique signature each time because it copies the movement of the author in real time. It has several other potential applications. It could increase credit card security and allow people to sign contracts from another province. The video exchange between signer and receiver can be recorded on DVD for proof when legal documents are used.
“It’s really fun,” said the owner of a bookstore, who was present for one of the test runs. “Obviously you can’t shake hands with the author, but there are chances for a connection that you don’t get from a regular book signing.”
The response to the invention has not been all favorable. Atwood has received criticism from authors who think she is trying to end book tours. But she said, “It will be possible to go to places that you never got sent to before because the publishers couldn’t afford it.”
1.How does the LongPen work?
A. It copies the author’s signature and prints it on a book.
B. It signs a book while receiving the author’s signature.
C. The fan uses it to copy the author’s signature himself.
D. The webcam sends the author’s signature to another city.
2.What do we know about the invention of the LongPen?
A. The designers were well-prepared for the difficulty.
B. The basement caught fire by accident.
C. Some versions failed before its test run.
D. It has been completed but not put into use.
3.How could the LongPen be used in the future?
A. To allow author and fan to exchange videos
B. To improve credit card security.
C. To keep a record of the author’s ideas.
D. To draft legal documents.
As an old-fashioned explorer, Paul Salopek sets out on foot to circle around the world. He is also a modern-day explorer. On top of a few clothes, a small first-aid kit and notebooks, he is carrying a recorder, a video camera, a small computer and a satellite phone — a telephone that connects to a satellite and can be used in many places where cell-phones don’t work.
The journey is long: 21,000 miles! It will take seven years to complete it.
Salopek was born in California and spent his childhood in Mexico. He says he has always liked to travel and doesn’t like to rush. At the age of fourteen, he climbed Mount Whitney in California and crossed the state’s Sierra Nevada Mountains alone. When he was fifteen years old, he walked the length of Death Valley. He once rode a mule 2,000 miles through mountains in Mexico.
As a longtime reporter, Salopek has reported from Africa, Asia and Mexico. Now 51 years old, he plans to keep writing. As he travels around the world, he is writing stories about the people he meets and the way they live. He looks for how people find local solutions to big problems such as lack of food and water. He also records the sounds he hears and takes photos of the sky and the Earth’s surface.
The long walk started in the Rife Valley in Ethiopia in East Africa. Many consider East Africa to be home to the first humans, who lived 160,000 years ago.
Salopek is retracing the paths our ancestors took as they left Africa and settled in parts of the Middle East, Europe, Asia and the Americas. As Salopek is walking, he is learning more about himself and all of humankind.
1.The underlined phrase “on top of” in the first paragraph can be replaced by ______________.
A. at the top of B. in contrast to
C. in addition to D. on the basis of
2. The author develops the third paragraph mainly by ______________.
A. providing examples
B. making comparisons
C. making a careful analysis
D. following the order of time
3. According to the passage, Paul Salopek is a ______________.
A. doctor who likes carrying the small first-aid kit
B. journalist who likes traveling, exploring, writing and studying
C. writer who likes traveling, exploring and studying
D. photographer who is good at using satellite communication equipment
4.What’s the best title for the passage?
A. Paul Salopek: Following Man’s First Footsteps
B. Paul Salopek: Reflecting People’s Real Lives
C. Paul Salopek: Going for a Seven-year Study
D. Paul Salopek: Looking back upon the Childhood
