Since the gene, called DAF-16 in worms, was found in many animals and in humans, the finding could open up new ways to affect aging, immunity(免疫)and resistance in humans, the scientists said.
“We wanted to find out how normal aging is being governed by genes and what effect these genes have on other traits, such as immunity,” said Robin May of the University of Birmingham, who led the study.
Populations across the world are aging at a surprising pace, bringing potentially big challenges for health and social care systems. A study by Danish scientists last year found that half of babies born in the rich world today will live to celebrate their 100th birthdays. Scientists are eager to find out how people age to try to develop drugs to help them stay healthier as their lives extend.
“What we have found is that things like resistance and aging tend to go hand in hand,” May said in an interview.
May’s team compared longevity, stress resistance and immunity in four related species of worm. They also looked for differences in the activity of DAF-16 in each of the four species, and found that they were all quite distinct.
May said DAF-16 was active in most cells in the body and was very similar to a group of human genes called FOXO genes, which scientists believe play a role in the aging process.
“The fact that subtle（微妙的）differences in DAF-16 between species seem to have such an impact on aging and health is very interesting and may explain how differences in lifespan and related traits have arisen during evolution,” May said.
64. In which section may the text appear in a newspaper?
A. Education. B. Science. C. Entertainment. D. Culture.
65. What can we know from the third paragraph?
A. New ways have been found to affect aging. B. Babies in the rich world will all live longer.
C. Present social care systems are poorly managed.
D. Aging populations are causing more challenges.
66. From the text we know that DAF-16._________
A. is a gene that is only found in worms B. can make people live longer
C. has an effect on aging and immunity D. has been quite familiar to scientists
67. What can be the best title of the passage?
A. Scientists Find Gene Linked to Aging B. Population Aging Faster than Expected
C. How to Make People Live Longer D. Gene Determines How Long We Live
C
A young woman carrying a three-year-old child got on a bus. The conductor(售票员) hurried to give her a warm welcome and then kindly asked the other passengers to make more room for the woman and her child. On seeing this, people began to talk. "You know this conductor used to be very rude. Now suddenly he has changed his bad behavior , "said a middle-aged man.
"Yes, he should be praised and we must write a letter to the company," said a second passenger. "That's right," another lady said, "I wish a newspaper reporter were here so that more people could learn from this conductor. "
Just then a gentleman who looked like a teacher turned to the conductor and said , "Excuse me, but can I know your name, please? Your excellent service must be praised..."
Before he could open his mouth, the three-year-old child sitting on the young woman's lap interrupted, "I know his name. I call him Dad."
46. The passengers were ________ to see the conductor's kindness to the woman and the child.
A. excited B. unpleased C. interested D. surprised
47. One passenger suggested writing a letter to the company to ______.
A. make a demand for more buses
B. thank the conductor for his good service
C. criticize the conductor for his rude behavior
D. invite a newspaper reporter to write about the conductor
48. What was the gentleman?
A. A teacher. B. A newspaper reporter.
C. Not known from the story. D. The conductor's friend from his company.
49. The word "he" in the last paragraph refers to _______.
A. the gentleman B. the conductor
C. the middle-aged man D. the three-year-old child
50. It is clear from the story that the conductor _______.
A. has changed his attitude towards his work
B. has now been kind and polite to all passengers
C. has not changed his rude behavior to passengers probably
D. has now been kind and polite to women with children
B
Your body, which has close relations with the food you eat, is the most important thing you own, so it needs proper treatment and proper nourishment（营养）. The old saying "An apple a day keeps the doctor away. " is not as silly as some people think. The body needs fruit and vegetables because they contain vitamin C. Many people take extra vitamins in pill form(丸剂), believing that these will make them healthy. But a good diet is made up of nourishing food and this gives all the vitamins you need. The body doesn't need or use extra vitamins, so why waste money on them?
In the modem western world, many people are too busy to bother about eating properly. They throw away the good habits and throw anything into their stomachs, eating hurriedly and carelessly. The list of illnesses caused or made worse by bad eating habits is frightening.
41. From the first sentence we know that ________,
A. all kinds of food you eat can be made into nourishment
B. your body is made up of the food you eat.
C. what you eat has great effect on your health
D. the more you eat, the better you will feel
42. How do you understand the old saying underlined in the passage?
A. Eating apples regularly brings lots of benefits to our health.
B. Doctors are no longer necessary if we eat an apple every day.
C. The apple is the best among all kind of fruits.
D. An apple is a good way to cure illnesses.
43. What can we conclude from the second paragraph?
A. Our bodies need food, or we can't live.
B. Often eating apples is a good habit.
C. Taking extra vitamin pills is completely useless.
D. A good diet is of great importance for our health.
44. In modern we
stern countries, ________.
A. people don't want to pay more attention to their eating
B. lots of people's illnesses are caused or made worse by bad eating habits
C. people throw everything into their stomachs without digestion（消化）
D. people are only too busy to cook meals for themselves
45. If we want to keep healthy, we should ________ .
A. only eat an apple a day
B. eat properly
C. take as many vitamin pills as possible
D. throw everything into our stomachs slowly and carefully
第二部分:阅读理解(共20小题；每小题2分,满分40分)
阅读下面短文,从A、B、C、D四个选项中,选出最佳选项。
A
How Americans Began to Eat Tomatoes
People have strange ideas about food. For example, the tomato is a kind of very delicious vegetable. It is one of useful plants that can be prepared in many ways. It has rich nutrition and vitamin in it. But in the 18th century, Americans never ate tomatoes. They grew them in their gardens because tomato plants are so pretty. But they thought the vegetable was poisonous (有毒的). They called tomatoes “poison apples.”
President Thomas Jefferson, however, knew that tomatoes were good to eat. He was a learned man. He had been to Paris, where he learned to love the taste of tomatoes. He grew many kinds of tomatoes in his garden. The President taught his cook a way for a cream of tomato soup. This beautiful pink soup was served at the President’s party. The guests thought the soup tasted really good. They never thought their president would serve his honored guests poison apples. Jefferson never spoke to his honored (忠实的) guests about the fact.
36. After you read the passage, which of the following do you think is true?
A. Americans never ate tomatoes after they began to plant them.
B. Americans didn’t eat tomatoes before 19th century.
C. Even now Americans don’t eat tomatoes.
D. In the 18th century Americans ate a lot of tomatoes.
37. The passage tells us that Jefferson was a President who learned to love the taste of tomatoes___.
A. while he was in Paris B. when he was a little boy
C. because his parents told him so D. from books
38. According to the text, _______ made the beautiful pink soup served at the President’s party?
A. the President himself B. a French cook
C. the President’s cook D. the President’s wife
39. From the passage we know all the honored guests invited by Jefferson were .
A. people from other countries B. from France
C. people of his own country D. men only
40. According to the passage, which of the following is NOT true?
A. All of the guests knew the soup that was served at the President’s party was made of tomatoes.
B. All of the guests thought the soup which was prepared by the President’s cook was nice.
C. All of the guests thought the taste of the beautiful pink soup was nice.
D. None of the guests knew that their president would serve his honored guests poison apples.
D
Sure, it’s good to get along with your teacher because it makes the time you spend in the classroom more pleasant.
And yes, it’s good to get along with your teacher because, in general, it’s smart to learn how to relate to the different types of people you’ll meet throughout your life.
But really, there’s one super-important reason why you should get along with your teacher. When you do, “learning bursts right open,” says Evelyn Vuko, a longtime teacher who writes an education column called “Teacher Says” for the Washington Post newspaper.
In fact, kids who get along with their teachers not only learn more, but they’re more comfortable asking questions and getting extra help. This makes it easier to understand new material and do your best on tests. When you have this kind of relationship with a teacher, he or she can be someone to turn to with problems, such as problems with learning or school issues, such as bullying(欺负人).
As a kid in a primary or middle school, you’re at a wonderful stage in your life. You’re like a sponge(海绵), able to soak up lots of new and exciting information. On top of that, you’re able to think about all this information in new ways. Your teacher knows that, and in most cases, is very excited to be the person who’s giving you all that material and helping you put it together. Remember, teachers are people, too, and they feel great if you’re open to what they’re teaching you. That’s why they wanted to be teachers in the first place --- to teach!
Some kids may be able to learn in any situation, whether they like the teacher or not. But most kids are sensitive to the way they get along with the teacher, and if things aren’t going well, they won’t learn as well and won’t enjoy being in class.
67. In the passage, the teacher mainly talks about _____.
A. how to get along well with teachers
B. the importance of a good relation with teachers
C. how much the students are expected of to get along with teachers
D. how to make the time in the classroom more pleasant
68. “Learning bursts right open” in the third paragraph really means _____.
A. learning becomes easier for you at once
B. you find an opening to learning
C. there’ll be more problems with learning
D. there’ll be no problems with learning.
69. According to the passage, which of the following offers the best reasoning?
A. You are getting on well with your teachers, so you have more questions than others.
B. You find it comfortable to ask questions, so you can build a good relationship with teachers.
C. You have a good relationship with teacher, so you can turn to him/ her when in trouble.
D. You are in trouble, so you can build a good relationship with teachers.
70. Which of the comments is FALSE on teachers and their work according to the passage?
A. Teachers are exited even if you wouldn’t like to accept their teaching.
B. Teachers sometimes have the same feelings as students do.
C. Though few there are still some students who can learn even if they don’t like the teacher.
D. Having a bad relationship with your teachers does more or less harm to your studies.
C
Scientists used to explore on the surface of the ocean. Now they are exploring below the surface, too. They want to know about ocean water and the plant and animal life deep in the ocean.
In 1934 the scientist William Beebe dived 3,000 feet below the surface in a hollow steel ball. In 1935 August Piccard dived 10, 330 feet. In 1960 his son Jean dived to a depth of 35,800 feet.
All these early dives were deep. But the divers could not stay down for very long. They had to come back up to the surface after a few seconds. Scientists needed to stay down longer to study life below the surface. Gradually they succeeded. Cousteau, a Frenchman, was able to keep men down to a depth of 36 feet for one month and to a depth of 90 feet for a week.
Now scientists are developing even better equipment. With this new equipment, men can stay below the surface for days or even weeks. In 1962 Cousteau set up a research station 35 feet below the surface. Then in 1964 he set up another station on the ocean floor of the Red Sea. This was the first undersea station to operate without help from the surface.
Many countries are now studying undersea living things. The former Soviet Union had an undersea laboratory in the Crimean Sea. The United States has a laboratory 50 feet down on the ocean floor off the Virgin Islands. In 1970 five men lived there for two weeks. Then a team of five women scientists stayed in the laboratory. Next came other teams of men. All were there to explore the ocean depths and to make plans for the use of its resources. Scientists hope to find enough mineral, vegetable, and animal wealth there to provide food for the entire world.
64. In order to _____, scientists are exploring below the surface of the ocean.
A. know about the ocean water deep in the ocean
B. know about the plant and animal life deep in the ocean
C. stay down longer to study life of the plant and animal below the surface
D. both A and B
65. Who set up the first undersea station?
A. A Frenchman B. An American
C. A Russian D. The passage made no mention
66. Which of the following is true according to the passage?
A. Nobody can stay below the surface of the ocean.
B. The early divers could not stay below the surface of the ocean for very long.
C. The purpose of setting up the undersea laboratories is to make plans for the use of the resources in the ocean.
D. Up to now only five women scientists have stayed in the undersea laboratory.
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