Ever since t
he first skyscraper(摩天大楼) was built in Chicago in 1883, more and more buildings that reach for the skies have been constructed in the large cities of the world.
For many years, the Empire State Building in New York City was the tallest building in the world. It was 1250 feet high when it was opened in 1931. Then in 1951 a TV transmission⑨ tower was added for radio and television broadcasts. This tower added 222 feet to its height.
Soon other skyscrapers were built. The World Trade Center in New York, 1350 feet high, and 
Chicago’s Sears Tower, 1450 feet high. No one can say how much higher skyscrapers will go in the future.
Early skyscrapers were built with thick heavy walls of solid brick, stone, or concrete. Now the new skyscrapers are built with a steel framework⑩ that supports the weight of the building. The solid walls are no longer needed, and the framework makes it possible to build to greater heights.
Built at first mainly for offices and shops, some skyscrapers are now becoming homes for people who want to live in the center of the city. The 100-story John Hancock Center, a Chicago skyscraper that opened in 1970, is an example. Between the first and 43rd floor, there are offices and shops. There is a swimming pool on the 44th floor. From the 45th floor to the 92nd there are apartments. The people who live in these apartments can look down on the clouds instead of up at them.
67.What happened to the Empire State Building in 1951?
A. It was no longer the tallest building in the world.
B. A tower was added to it, which increased its height.
C. It was transformed into a radio and television broadcasting station.
D. It provided homes for people who wanted to live in the city center.
68.We cannot know how much taller skyscrapers will become in the future because _______________.
A. a TV transmission tower can be added
B. solid walls of brick, stone or concrete are no longer needed
C. the steel framework makes it possible to build to greater heights
D. some skyscrapers are now becoming homes
69.Originally, skyscrapers were built as _______________.
A. business centers and offices
B. radio and television broadcasting stations
C. apartment complexes
D. apartment and shops
70.How do people benefit from living in the John Hancock Center?
A. They can enjoy looking at the clouds above the building.
B. They have all the city center facilities nearby.
C. They can use the swimming pool on the top of the building.
D. They can work at offices inside the building.
Homestay provides English language students with the opportunity to speak English outside the classroom and the experience of being part of a British home．
What to Expect
The host will provide accommodation and meals．Rooms will be cleaned and bedcovers changed at least once a week．You will be given the house key and the host is there to offer help and advice as well as to take an interest in your physical and mental health．
Accommodation Zones
Homestays are located in London mainly in Zones 2, 3 and 4 of the transport system．Most hosts do not live in the town centre as much of central London is commercial and not residential（居住的）．Zones 3 and 4 often offer larger accommodation in a less crowned area．It is very convenient to travel in London by underground．
Meal Plans Available
♢ Continental Breakfast
♢ Breakfast and Dinner
♢ Breakfast, Packed Lunch and Dinner
It’s important to note that few English families still provide a traditional cooked breakfast．Your accommodation includes Continental Breakfast which normally consists of fruit juice, cereal（谷物类食品），bread and tea or coffee．Cheese, fruit and cold meat are not normally part of a Continental Breakfast in England．Dinners usually consist of meat or fish with vegetables followed by desert, fruit and coffee．
Friends
If you wish to invite a friend over to visit, you must first ask your host’s permission．You have no right to entertain friends in a family home as some families feel it is an invasion of their privacy．
Self-Catering Accommodation in Private Homes
Accommodation on a room-only basis includes shared kitchen and bathroom facilities and often a main living room．This kind of accommodation offers an independent lifestyle and is more suitable for the long-stay student．However, it does not provide the same family atmosphere as an ordinary homestay and may not benefit those who need to practice English at home quite as much．The passage is probably written for___________．
| A．host willing to receive foreign students |
| B．foreigners hoping to build British culture |
| C．travelers planning to visit families in London |
| D．English learners applying to live in English homes |
Which of the following will the host provide?
| A．Room cleaning． | B．Medical care． |
| C．Free transport． | D．Physical training． |
What can be inferred from Paragraph 3?
| A．Zone 4 is more crowded than Zone 2． |
| B．The business centre of London is in Zone 1． |
| C．Hosts dislike travelling to the city centre． |
| D．Accommodation in the city centre is not provided． |
According to the passage．What does continental Breakfast include?
| A．Dessert and coffee |
| B．Fruit and vegetables． |
| C．Bread and fruit juice |
| D．Cereal and cold meat． |
Why do some people choose self-catering accommodation?
| A．To experience a warmer family atmosphere． |
| B．To enrich their knowledge of English． |
| C．To entertain friends as they like． |
| D．To enjoy much more freedom． |
Motherhood may make women smarter and may help prevent dementia（痴呆） in old age by bathing the brain in protective hormones（荷尔蒙） , U．S．researchers reported on Thursday．
Tests on rats show that those who raise two or more litters of pups do considerably better in tests of memory and skills than rats who have no babies, and their brains show changes that suggest they may be protected against diseases such as Alzheimer’s（早老痴呆症）．University of Richmond psychology professor Craig Kinsley believes his findings will translate into humans．“Our research shows that the hormones of pregnancy（怀孕） are protecting the brain, including estrogen（雌激素）, which we know has many neuroprotective （保护神经的） effects,” Kinsley said．
“It’s rat data but humans are mammals just like these animals are mammals,” he added in a telephone interview．“They go through pregnancy and hormonal changes．” Kinsley said he hoped public health officials and researchers will look to see if having had children protects a woman from Alzheimer’s and other forms of age-related brain decline．
“When people think about pregnancy, they think about what happens to babies and the mother from the neck down,” said Kinsley, who presented his findings to the annual meeting of the Society of Neuroscience in Orlando, Florida．
“They do not realize that hormones are washing on the brain．If you look at female animals that have never gone through pregnancy, they act differently toward young．But if she goes through pregnancy, she will sacrifice her life for her infant—that is a great change in her behavior that showed in genetic alterations（改变） to the brain．”How do scientists know “Motherhood may make women smarter”?
| A．Some researchers have told them． |
| B．Many women say so． |
| C．They know it by experimenting on rats． |
| D．They know it through their own experience． |
What does the phrase “litters of pups” mean in the second paragraph?
| A．Baby rats． | B．Animals． | C．Old rats． | D．Grown-up rats． |
What can protect the brain of a woman according to the passage?
| A．Estrogen． |
| B．The hormones of pregnancy． |
| C．More exercise． |
| D．Taking care of children． |
“It’s rat data but humans are mammals just like these animals are mammals．” What does the sentence suggest?
| A．The experiments on the rats have nothing to do with humans． |
| B．The experiments on the rats are very important for animals． |
| C．The experiments on the rats are much the same on humans． |
| D．The experiments on the rats are much the same on other animals． |
Which title is the best for this passage?
| A．Do You Want to Be Smarter? |
| B．Motherhood Makes Women Smarter |
| C．Mysterious Hormones |
| D．An Important Study |
How could we possibly think that keeping animals in cages in unnatural environments－mostly for entertainment purposes－is fair and respectful?
Zoo officials say they are concerned about animals．How ever, most zoos remain “collections” of interesting “things” rather than protective habitats （栖息地）．Zoos teach people that it is acceptable to keep animals bored, lonely, and far from their natural bones．
Zoos claim （声称） to educate people and save endangered species（物种）, but visitors leave zoos without having learned anything meaningful about the animals’ natural behavior, intelligence, or beauty．Zoos keep animals in small spaces or cages, and most signs only mention the species’ name, diet, and natural range（分布区）．The animals’ normal behavior is seldom noticed because zoos don’t usually take care of the animals’ natural needs．
The animals are kept together in small spaces, with no privacy and little opportunity for mental and physical exercise．These results in unusual and self-destructive behavior called zoophobia．A worldwide study of zoos found that zoophobia is common among animals kept in small spaces or cages．Another study showed that elephants spend 22 percent of their time making repeated head movements or biting cage bars, and bears spend 30 percent of their time walking back and forth, a sign of unhappiness and pain．
Furthermore, most animals in zoos are not endangered．Captive breeding（圈养繁殖）of endangered big cats, Asian elephants, and other species has not resulted in their being sent back to the wild．Zoos talk a lot about their captive breeding programs because they do not want people to worry about a species dying out．In fact, baby animals also attract a lot of paying customers．Haven’t we seen enough competitions to name baby animals?
Actually, we will save endangered species only if we save their habitats and put an end to the reasons people kill them．Instead of supporting zoos, we should support groups that work to protect animals’ natural habitats．How would the author describe the animals’ life in zoos?
| A．Dangerous． | B．Unhappy． | C．Natural． | D．Easy． |
In the state of zoophobia, animals _________．
| A．remain in cages | B．behave strangely |
| C．attack other animals | D．enjoy moving around |
What does the author try to argue in the passage?
| A．Zoos are not worth the public support． |
| B．Zoos fail in their attempt to save animals． |
| C．Zoos should treat animals as human beings． |
| D．Zoos use animals as a means of entertainment． |
The author tries to persuade readers to accept his argument mainly by _____．
| A．pointing out the faults in what zoos do |
| B．using evidence he has collected at zoos |
| C．questioning the way animals is protected |
| D．discussing the advantages of natural habitats |
Although he argues against zoos, the author would still agree that _______．
| A．zoos have to keep animals in small cages |
| B．most animals in zoos are endangered species |
| C．some endangered animals are reproduced in zoos |
| D．it’s acceptable to keep animals away from their habitats |
A year ago August, Dave Fuss lost his job driving a truck for a small company in west Michigan．His wife, Gerrie, was still working in the local school cafeteria, but work for Dave was scarce, and the price of everything was rising．The Fusses were at risk of joining the millions of Americans who have lost their homes in recent years．Then Dave and Gerrie received a timely gift—＄7,000，a legacy （遗产） form their neighbors Ish and Arlene Hatch, who died in an accident ．“It really made a difference when we were going under financially．” says Dave．
But the Fusses weren’t the only folks in Alto and the neighboring town of Lowell to receive unexpected legacy from the Hatches．Dozens of other families were touched by the Hatches’ generosity．In some cases, it was a few thousand dollars ; in other, it was more than ＄100,000．
It surprised nearly everyone that the Hatches had so much money, more than ＄3 million—they were an elderly couple who lived in an old house on what was left of the family farm ．
Children of the Great Depression, Ish and Arlene were known for their habit of saving．They thrived on（喜欢）comparison shopping and would routinely go from store to store, checking prices before making a new purchase ．
Through the years, the Hatches paid for local children to attend summer camp when their parents couldn’t afford it．“Ish and Arlene never asked whether you needed anything,” says their friend Sand Van Weelden, “They could see things they could do to make you happier, and they would do them．
Even more extraordinary was that the Hatches had their farmland distributed．It was the Hatches’ wish that their legacy—a legacy of kindness as much as one of dollars and cents —should enrich the whole community and Ish and Arlene Hatch’s story．
Neighbors helping neighbors ——that was Ish and Arlene Hatch’s story．According go the text, the Fusses_______________．
| A．were employed by a truck company |
| B．were in financial difficulty |
| C．worked in a school cafeteria |
| D．lost their home |
Which of the following is true of the Hatches?
| A．They had their children during the Great Depression． |
| B．They left the family farm to live in an old house． |
| C．They gave away their possessions to their neighbors． |
| D．They helped their neighbors to find jobs． |
Why would the Hatches routinely go from store?
| A．They decided to open a store． |
| B．They wanted to save money． |
| C．They couldn’t afford expensive things． |
| D．They wanted to buy gifts for local kids． |
According to Sand Van Weelden, the Hatches were_________．
| A．understanding | B．optimistic | C．childlike | D．curious |
What can we learn from the text?
| A．The community of Alto was poor． |
| B．The summer camp was attractive to the parents． |
| C．Sandy Van Weelden got a legacy form the Hatches． |
| D．The Hatches would like the neighbors to follow their example． |
The hole in the earth's protective ozone layer（臭氧层）won't repair itself until about two decades later than had been expected, scientists announced.
The ozone layer blocks more than 90 percent of the sun's ultraviolet radiation（紫外线辐射）, helping to make life on Earth possible. For many dacades, ozone was depleted（削减） by chlorine and bromine gas in the air. A hole in the ozone layer formed over the Southern Hemisphere.
Computer models had forecast that the hole would fill back in by 2050. An improved computer model forecasts the recovery won't occur until 2068. The model, fed with fresh data from statellites and airplanes, was supported by the fact that it accurately reproduced ozone levels in the Antarctic stratosphere（平流层）over the past 27 years.
The ozone hole is actually more of a broad region with less ozone than ought to occur naturally. It is not limited to Antarctica, as is often believed.
Over areas that are farther from the poles like Africa or the US, the levels of ozone are only three to six percent below natural levels. Over Antarctica, ozone levels are 70 percent lower in the spring. This new method allows us to more accurately estimate（估计）ozone-depleting gases over Antarctica, and how they will decrease over time, reducing the ozone hole area.
Paul Newman, a scientist,said that the ozone hole has not started to become smaller as quickly as expected. They figure it will not become much smaller until 2018, after which time the recovery should proceed more quickly. And the hole will not be filled in again until 2065.According to the passage, the ozone layer _______
| A．absorbs as much as sunlight as possible |
| B．protects man against ultraviolet radiation |
| C．controls the changes in temperature |
| D．prevents the production of carbon dioxide |
The improved computer model is believable because _________
| A．it was once proved by facts |
| B．it has been studied for 27 years |
| C．it was created by many scientists |
| D．it is related to satellites and airplanes |
The underlined word “they” in the fifth paragraph refers to ________
| A．the levels of ozone |
| B．ozone-depleting gases |
| C．the ozone holes |
| D．the areas far from the poles |
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