At night, bats fly through the air, catching hundreds of insects and other small animals. But during the day, they hardly move at all. Instead, bats pass the time hanging upside down from a secret spot.
There are a couple of reasons why bats rest this way. First of all, it puts them in a position for takeoff. Unlike birds, bats can’t fly into the air from the ground. Their wings don’t produce enough lift to take off from a dead stop, and their hind legs are so small and underdeveloped that they can’t run to build up the necessary takeoff speed. Instead, they use their front claws to climb to a high spot, and then fall into flight.
During the hours when most enemies are active, bats gather where few animals would think to look and most can’t reach. This allows
them to disappear from the world until night comes again. There’s also little competition for these resting spots, as other flying animals don’t have the ability to hang upside down.
Bats have a unique physiological adaptation that lets them hang around this way without using a
ny energy. For you to hold your fist around an object tight, you contract（紧缩）several muscles in your arm, which are connected to your fingers by ten
dons（腱）；as one muscle contracts, it pulls a tendon, which pulls one of your fingers closed. A bat’s talons（爪）close in the same way, except that their tendons are connected only to the upper body, not to a muscle. To hang upside down, a bat pulls its claws open with other muscles. To get the talons to take hold of the surface, the bat simply lets its body relax. The weight of the upper body pulls down on the tendons connected to the talons, causing them to hold tight. Therefore, the bat doesn’t have to do anything to hang upside down.Bats hang upside down because________．
| A．they haven’t developed a pair of strong claws | B．they can’t start to fly from the ground directly |
| C．they have no hind legs to support their body | D．they can’t find quiet places to stay during the day |
The third paragraph tells us that bats’ hanging upside down_______.
| A．is to save their energy for night movement | B．is a way to fight against flying animals |
C．is a great way to hide from danger |
D．is a skill to compete for the flying places |
Why can bats hang upside down easily?
| A．Because their upper body is light. |
| B．Because they have strong muscles. |
| C．Because their talons are linked to muscles tightly. |
| D．Because their tendons are linked to their upper body. |
What is the passage mainly about?
| A．The living habits of bats. | B．How and why bats  hang upside down. |
| C．The importance of bats’ hanging upside down. | D．How bats use their energy at night. |
We can see how the product life cycle works by looking at the introduction of instant coffee. When it was introduced, most people did not like it as much as "regular" coffee and it took several years to gain general acceptance (introduction stage). At one point, though, instant coffee grew rapidly in popularity and many brands were introduced (stage of rapid growth). After a while people became attached to one brand and sales leveled off (stage of maturity). Sales went into a slight decline when freeze-dried coffees were introduced (stage of decline).
The importance of the product life cycle to marketers is this: different stages in the product life cycle call for different strategies. The goal is to extend product life so that sales and profits do not decline. One strategy is called market modification. It means that marketing managers look for new users and market sections. Do you know, for example, that the backpacks that so many students carry today were originally designed for the military?
Market modification also means searching for increased usage among present customers or going for a different market, such as senior citizens. A marketer may re-position the product to appeal to new market sections.
Another product extension strategy is called product modification. It involves changing product quality, features, or style to attract new users or more usage from present users. American auto manufacturers are using quality improvement as one way to recapture（夺回） world markets. Note, also, how auto manufacturers once changed styles dramatically from year to year to keep demand from falling.
46. According to the passage, when people grow accustomed to one particular brand of a product, its sales will ______.
A. decrease gradually B. become unstable
C. improve enormously D. remain at the same level
47. The first paragraph tells us that a new product is _____ .
A. usually introduced to satisfy different tastes
B. often more expensive than old ones
C. often inferior to old ones at first
D. not easily accepted by the public
48. Marketers need to know which of the four stages a product is in so as to _____ .
A. work out marketing policies B. promote its production
C. increase its popularity D. speed up its life cycle
49. The author mentions the example of "backpacks"(Line 4, Para.2 ) to show the importance of _______ .
A. increasing usage among students B. pleasing the young as well as the old
C. exploring new market sections D. serving both military and civil needs
50. In order to recover their share of the world market, U.S. auto makers are _______ .
A. improving product feature B. making their products better
C. modernizing product style D. increasing product quantity
A new study of 8,000 young people in the journal of Health and Social Behavior shows that although love can make adults live healthily and happily, it is a bad thing for young people. Puppy love（早恋）may bring stress for young people and can lead to depression. The study shows that girls become more depressed than boys, and younger girls are the worst of all.
The possible reason for the connection between love and higher risk of depression for girls is “loss of self”. According to the study, even though boys would say “lose themselves in a romantic relationship”, this “loss of self” is much more likely to lead to depression when it happens to girls. Young girls who have romantic relationships usually like hiding their feelings and opinions. They won’t tell that to their parents.
Dr. Marianm Kaufman, an expert on young people problems, says 15% to 20% young people will have depression during their growing. Trying romance often causes the depression. She advises kids not to jump into romance too early. During growing up, it is important for young people to build strong friendship and a strong sense of self. She also suggests the parents should encourage their kids to keep close to their friends, attend more interesting school activities and spend enough time with family.
Parents should watch for signs of depression—eating or mood changes—and if they see signs from their daughters or sons, they need to give help. The good news is that the connection between romance and depression seems to become weak with age. Love will always make us feel young, but only maturity（成熟）gives us a chance to avoid its bad side effects.
41. What’s the main idea of the passage?
A. Puppy love may bring young people depression.
B. Parents should forbid their children’s love.
C. Romance is a two-edged sword for adults.
D. Romance is good for young people.
42. Which of the following are more likely to have depression?
A. Young people who have a strong sense of self.
B. Young boys whose parents watch for their behavior.
C. Young girls who always hide their feelings and opinions.
D. Careless parents whose children are deep in love.
43. What can be inferred from the passage?
A. Lacking love can lead young people to grow up more quickly.
B. Early love makes young people keep close to their friends and parents.
C. Parents should help their children to be aware of the signs of depression.
D. The older a woman is, the less likely she seems to lose herself in romance.
44. What’s the author’s attitude towards puppy love?
A. Confused. B. Disapproving.
C. Uninterested. D. Scared.
45. Dr. Marianm Kaufman does NOT suggest parents’ encouraging their kids to ______.
A. keep close to their friends
B. attend more interesting activities
C. chat more on line
D. spend more time with their family
If Barack Obama's wife and kids thought they'd be getting his undivided attention during their long-awaited summer holiday, perhaps they should think again.
The US President kicked off his vacation by revealing that, in addition to endless games of tennis and golf, he plans to spend the week ploughing through five books, weighing in at an astonishing 2,300 pages. His summer reading list, unveiled(透露) by the White House, contains two heavyweight works of non–fiction and three novels.
On top of the president’s table is Hot, Flat and Crowded, by New York Times columnist, Thomas Friedman. Subtitled "why we need a green revolution", it makes a leftish（左倾的） call to arms regarding the future of the planet.
Mr Obama's second choice is historian David McCullough's biography of John Adams, the often under-rated second US president, who was the subject of an award-winning HBO docu-drama（纪实剧）last year.
The novels include two crime thrillers: Richard Price's Lush Life, and The Way Home, a novel by George Pelecanos set in Washington, DC – which, much like Obama's best-selling autobiography（自传）, explores the relationship between a father and his son.
Completing the set is the novel Plainsong, by a little-known writer called Kent Haruf. Set in a small town on the Colorado plains, its existence on the reading list may reassure voters that Middle America has not been ignored by their commander-in-chief.
Publishers are keeping an eye on whether the famous "Obama bounce" – which has helped sales at the first family's favourite clothes stores, such as J Crew – will continue to apply to their troubled industry. The President's endorsement（认可） is said to have lifted sales of Joseph O'Neill's novel Netherland about cricket in Holland and New York last year.
Given that President Obama has already spent a portion of his week so far playing golf, beating Michelle at tennis, and visiting friends, questions will inevitably(不可避免地) be asked about his ability to put any dent（挫伤） at all in the ambitious reading list.
To finish all five books, he would have to manage more than 300 pages every day – quite an "ask" when a small portion of his time must also be spent running the country.
57. What’s the function of the first paragraph?
| A. To give an example. |
B. To introduce a topic. |
| C. To describe a hope. |
D. To offer an argument. |
58. Which of the following statements is NOT true?
| A. Some people doubted if the president could finish his books. |
| B. The Way Home is a book which explores the relationship between a father and his son. |
| C. Lush life, set in Washington, is a novel written by Richard Price. |
| D. Thanks to Obama, sales of Netherland have been lifted. |
59. Which of the following was NOT a book the President planned to read?
| A. John Adams. |
B. Netherland. |
| C. Hot, Flat and Crowded. |
D. Lush Life. |
60. Which of the following can be the best title of the passage?
| A. Obama’s Hobbies |
B. Obama’s Holiday Plan |
| C. Obama’s Holiday Life |
D. Obama’s Holiday Book List |
Fifty–eight percent of the teachers interviewed in the Association of Teachers and Lecturers (ATL) questionnaire had come across copying among their pupils. Gill Bullen from Itchen College in Southampton, for example, said, "Pieces handed in by two students were identical and significantly better than either of them could have done. Not only that, the essays handed in didn't quite answer the title question I had set". A teacher from Leeds said, "I had one piece of work so bravely cut and pasted that it still contained ads from the web page."
Connie Robinson from Stockton Riverside College said, "With less able students it is easy to spot copying as the writing style changes in the middle of the assignment, but with more able students it is sometimes necessary for tutors to carry out Internet research to identify the source of the copy."
Mary Bousted, general secretary of the ATL, said," Teachers are struggling under a mountain of cut-and-pasting to spot whether work was the student's own or copy." She called for policies to stop copying, and asked for help from exam boards and the government in providing resources and techniques to detect cheats.
But there was another side. "I have found once students clearly understand what copying is, its consequences and how to reference correctly so they can draw on published works, copying becomes less of a problem," said Diana Baker from Emmanuel College, Durham.
"I think the majority of students who engage in copying do it more out of ignorance than the desire to cheat. They really want to succeed on their own."
53. The passage mainly wants to tell us ____________.
| A. the benefits of the Internet for students |
| B. web copying is a serious problem in the UK |
| C. the ways to find web copying for teachers |
| D. how we can use the Internet to do homework |
54. The underlined word “identical” (Paragraph 1) probably means ____________.
| A. excellent |
B. contrasting |
C. the same |
D. complex |
55. What is TRUE according to Connie Robinson?
| A. It’s not easy to find the less able students copy from the Internet |
| B. It’s difficult to find whether the more able students have copied. |
| C. The less able student will not change their writing style when copying. |
| D. The more able students needn’t copy from the Internet. |
56. What’s the writer’s attitude towards “copying”?
| A. The writer doesn’t tell us. |
B. The writer feels angry about it. |
| C. The writer thinks it doesn’t matter. |
D. The writer approves of it. |
British and American scientists are raising genetically modified(转基因的) pigs in the hope of providing organs for transplant(移植) to humans, the project leader wrote in a newspaper Sunday.
Scientists in London and California have begun conducting the genetic experiments to find a solution to record–long waiting lists for organ transplants, Robert Winston said in an opinion piece written for Britain's Sunday Times.
In Britain alone, around 8,000 patients are waiting for a transplant.
"People needing a new heart or liver are waiting for someone else to die – usually a violent death in a traffic accident," Winston wrote in the newspaper. He said his team was "trying to modify pigs so their organs might save the lives of humans."
The scientists are introducing human genes into the animals to reduce the chances of the organs being rejected by patients, as has been common in previous attempts to use animal tissues, said Winston, who heads the Institute of Reproductive and Developmental Biology at London's Hammersmith Hospital.
Working with Dr. Carol Redhead of the California Institute of Technology, Winston's team has injected human genes directly into male piglets(猪仔), adding them to the animal's sperm(精子).
He said that pigs involved in experiments had successfully produced transgenic sperm, but acknowledged that British and European laws had prevented the team from using the pigs to mate.
The Sunday Times newspaper reported that the experiments would be moved to the United States following difficulties with funding and regulations in Britain. It said the pigs would be bred in Missouri.
"Our U.S. friends will benefit from our technology and the income we might have produced for Britain will be lost," Winston wrote.
Some scientists have previously blamed the idea of using animal organs for human transplant, saying the technique risks spreading animal viruses to humans. Winston said his research project is attempting to breed virus-free pigs.
49. Scientists are introducing human genes into the animals to ____________.
| A. make the organs healthier |
B. reduce the pain of animals |
| C. make the organs live longer |
D. reduce the chances of rejection |
50. Some scientists have blamed the idea of using animal organs for human transplant because ____________.
| A. the technique is not perfect now |
| B. humans may be infected with animal viruses |
| C. it is against laws and regulations |
| D. it may cause a conflict between humans and animals |
51. According to Winston, it seems ___________ to Britain to move the experiments to the United States.
| A. a pity |
B. a pride |
C. a disaster |
D. a good idea |
52. It can be inferred from the passage that ____________.
| A. animal organs are commonly used for human transplant now |
| B. lots of patients need animal organ transplants now |
| C. examples of the animal tissues being rejected have happened |
| D. it is not safe to use animal organs for human transplant |