1 . Dr. David Sullivan, pediatric dentist（儿科牙医）, is just wild about teeth. So are some of his
You see. Dr. David, as many people call him, has some
On most days, Dr. David tends to his human patients, teaching them how to care for their
“When I was a kid in school, the only thing I ever
But Dr. David soon
After he became a dentist, Dr. David
Word of Dr. David’s work with animals
| A．friends | B．patients | C．teachers | D．colleagues |
| A．unusual | B．young | C．interesting | D．serious |
| A．clearly | B．typically | C．rarely | D．traditionally |
| A．dead | B．pet | C．real | D．toy |
| A．feet | B．ears | C．eyes | D．teeth |
| A．successful | B．general | C．dental | D．experimental |
| A．special | B．painful | C．frightening | D．valuable |
| A．Finally | B．Luckily | C．Eventually | D．Gradually |
| A．fond | B．afraid | C．tired | D．ashamed |
| A．worrying about | B．asking about | C．preparing for | D．caring for |
| A．time | B．chance | C．principle | D．honor |
| A．hated | B．managed | C．wanted | D．failed |
| A．expected | B．guessed | C．realized | D．declared |
| A．impossible | B．wonderful | C．necessary | D．imperfect |
| A．comfortable | B．excited | C．pitiful | D．nervous |
| A．But | B．Because | C．And | D．So |
| A．arrived | B．performed | C．studied | D．worked |
| A．kids | B．models | C．animals | D．adults |
| A．rang | B．spread | C．faded | D．broke |
| A．help | B．advice | C．opinion | D．permission |
2 . In the United States, most of our electricity comes from power plants (发电厂) that burn coal and oil.
There are two big problems with using these things for electricity. First, their supply is limited (有限的). Second, burning them causes pollution. So to make sure we always have power and to keep our planet clean, we must find other ways to make electricity.
Some people think that wind power is our best choice. First, there will always be more wind. Also, wind power does not pollute the environment. Best of all, we don’t have to search for wind.
Today, less than 1 percent of our electricity comes from wind. But scientists have been developing better wind machines. As a result, wind power is getting more popular in this country.
Yet wind power may not keep growing so quickly in years to come. Why not? Many wind turbines (风力涡轮机) are needed to make much electricity. So wind-power companies try to build wind farms but are competing (竞争) with other uses for the land. A wind farm is a group of turbines placed close together in an area with frequent winds.
In places where companies try to build wind farms, people think that lines of turbines are ugly. Noise from turbines often troubles people. Also, turbines kill birds that fly into them.
Wind-power supporters disagree. They think the sight of wind turbines is lovely. They point out that people have gotten used to living near noisy highways. They say ways can be found to keep birds away from turbines.
In today’s world, we need clean and unlimited power sources more than ever. Unless a better power source comes along, people may just have to accept wind power as a part of their lives.
1. The underlined part “these things” in the second paragraph refers to ________.| A．frequent winds. | B．wind turbines. |
| C．power plants. | D．coal and oil. |
| A．How wind power works. |
| B．How wind power was found. |
| C．The advantages of wind power. |
| D．The development of wind power. |
| A．It is very expensive to build lots of wind turbines. |
| B．It is difficult to improve the wind power technology. |
| C．There are few people who accept it as a new power source. |
| D．Many wind turbines are needed and there is less space for them. |
| A．make a loud noise. |
| B．look very beautiful. |
| C．are built near highways. |
| D．provide places for birds to stay. |
| A．The Role of Wind. |
| B．The Power of Wind. |
| C．The Cost of Wind Power. |
| D．The History of Wind Power. |
3 . Priscilla Ouchida’s “energy efficient” house turned out to be a horrible dream. When she and her engineer husband married a few years ago, they built a $100,000 three-bedroom home in California. Tightly sealed to prevent air leaks, the house was equipped with small double-paned windows and several other energy-saving features. Problems began as soon as the couple moved in, however. Priscilla’s eyes burned. Her throat was constantly dry. She suffered from headaches and could hardly sleep. It was as though she had suddenly developed a strange illness.
Experts finally traced the cause of her illness. The level of formaldehyde gas in her kitchen was twice the maximum allowed by federal standards for chemical workers. The source of the gas? Her new kitchen cabinets and wall-to-wall carpeting.
The Ouchidas are victims of indoor air pollution, which is not given sufficient attention partly because of the nation’s drive to save energy. The problem itself isn’t new. “The indoor environment was dirty long before energy conservation came along,” says Moschandreas, a pollution scientist at Geomet Technologies in Maryland. “Energy conservation has tended to accentuate the situation in some cases.”
The problem appears to be more troublesome in newly constructed homes rather than old ones. Back in the days when energy was cheap, home builders didn’t worry much about unsealed cracks. Because of such leaks, the air in an average home was replaced by fresh outdoor air about once an hour. As a result, the pollutants generated in most households seldom built up to dangerous levels.
1. It can be learned from the passage that the Ouchidas’ house ________.| A．is well worth the money spent on its construction |
| B．is almost faultless from the point of energy conservation |
| C．failed to meet energy conservation standards |
| D．was designed and constructed in a scientific way |
| A．Poor quality of the air inside. | B．Poor quality of the construction. |
| C．Gas leakage in the kitchen. | D．The newly painted walls. |
| A．relieve | B．accelerate | C．worsen | D．improve |
| A．Because indoor cleanliness was not emphasized. |
| B．Because energy used to be inexpensive. |
| C．Because environmental protection was given top priority. |
| D．Because they were technically unavoidable. |
| A．Energy Conservation | B．House Building Crisis |
| C．Air Pollution Indoors | D．Traps in Building Construction |
| A．Rainy. | B．Sunny. | C．Cloudy. |
5 . Wind power is a very clean source of energy. This is how wind power works. Wind makes windmills spin(旋转). When the windmills spin, they make electricity. Then we can use the electricity.
A lot of people think that wind power is new, but that’s not true. For thousands of years, people have used wind to sail boats and move water. We still do those things today, but these days we mostly use wind power to make electricity.
Wind power is a very popular source of energy. Most people think that we should use it more and more. First of all, it’s clean. Windmills don’t pollute the environment at all. Second, we can use wind power forever. After all, we will always have wind. Also, wind power is cheap, and it’s getting even cheaper.
A lot of people don’t understand wind power very well. They believe that there are problems with wind power, but many of those problems are not real. For example, some people say that windmills are dangerous for birds. They used to be true, but it isn’t true anymore. Old windmills killed birds because they spun very fast. New windmills spin slowly, and they aren’t dangerous for birds.
However, there are real problems with windmills. One problem is that many people think windmills are very ugly. This is a problem for people, because windmills are often in very pretty areas. Also, wind doesn’t blow all the time, so we can’t use wind power all the time. Finally, windmills are noisy.
Wind power is becoming more and more common. Right now, more than 80 countries use wind power. About 2.5 percent of the world’s power comes from the wind. For some countries, that number is a lot higher. Wind power gives Denmark more than 25 percent of its electricity.
1. Why DON’T new windmills kill birds? Because ________.| A．birds don’t fly near them | B．they are shorter than old windmills |
| C．they spin slowly | D．new windmills don’t spin |
| A．Over 1,000 years ago. | B．About 500 years ago. |
| C．About 80 years ago. | D．About 25 years ago. |
| A．We can’t use windmills at night |
| B．Windmills break all the time |
| C．Wind doesn’t blow all the time |
| D．Windmills are too expensive to use all the time |
| A．Most people don’t like it. | B．Denmark doesn’t use it. |
| C．It’s getting more expensive. | D．It’s getting cheaper. |
| A．Dangerous Birds | B．Popular and Clean Wind Power |
| C．Cheap and Clean Energy | D．Expensive Windmills |
6 . Earthquakes strike suddenly at any time of the day or night, but there's no way to tell when. If an earthquake happens, it may cause many deaths, injuries and damage. So you need a good preparation ahead of time. Decide how and where your family will get together if separated. Choose an out-of-state friend or relative that the family members can call after the quake to report where they are and how they are. Know the safe places in each room: under the strong tables, desks, or against inside walls. Keep enough food, water and other things, including a flashlight, a radio, medicines and clothing.
During the earthquake, you should keep a clear head and never be too nervous to know what to do. Protect your head and neck with your arms. If possible, take a book, a pillow or any other things to protect yourself from falling glass and ruins. If you are indoors, you must immediately lie under any strong furniture. If outdoors, move to an open area away from trees, buildings, walls or power-poles. If you are in a narrow valley, move to the centre of it and look up for falling stones. If you are in a car, move to the side of the road and stop the car. Do not stop near buildings, power lines or on or under bridges. Stay in your car until the shaking stops.
Do not move a badly injured person unless he is in great danger after the earthquake. Do not use the telephone immediately unless there is a serious injury or fire. Turn on your radio for instructions and news reports. Be prepared for aftershocks. If you want to leave your home, post a message inside your home telling your family members where you can be found.
1. To prepare for an earthquake, we should make sure of ________.| A．when an earthquake may happen |
| B．the place where we can find our family |
| C．how to receive instructions and news reports |
| D．the money with which we can buy food and water |
| A．find a strong building to hide in |
| B．leave the car as soon as possible |
| C．go on driving quickly to leave the area |
| D．move to the side of the road and stop there |
| A．we should keep calm and know what to do clearly |
| B．the trees and walls can protect us if we are outdoors |
| C．we should protect our necks with a pillow or a book |
| D．falling glass can be used to help us |
| A．move an injured person quickly |
| B．use the telephone immediately |
| C．turn on the TV to get news reports |
| D．leave a message before leaving home |
7 . In the past 50 years, the amount of water in the open ocean with zero oxygen has increased more than four times. In coastal water bodies, including the river mouth and seas, low-oxygen sites have increased more than 10 times since 1950. Scientists expect oxygen to continue dropping even outside these zones as the Earth warms. To stop the decline, the world needs to control in both climate change and nutrient pollution.
Oxygen is a must to life in the oceans. The drop in ocean oxygen is among the most serious effects of human activities on the Earth’s environment.
This is the first time for the scientists to take such a deep look at the causes, consequences and solutions to low oxygen worldwide, in both the open ocean and in coastal waters. About half of the oxygen on the Earth comes from the ocean. However, combined effects of nutrient loading and climate change are greatly increasing the number and size of “dead zones”in the open ocean and coastal waters, where oxygen is too low to support most sea life.
In areas traditionally called “dead zones”, like those in Chesapeake Bay and the Gulf of Mexico, oxygen drops to levels so low that many animals have trouble in breathing and die. As fish run away from these zones, their living areas become smaller and smaller. But the problem goes far beyond “dead zones”. Even smaller oxygen drops can hold up the growth in animals, reproduction and lead to disease or even death. Low oxygen also can cause the release of dangerous chemicals. While some animals can thrive in dead zones, overall biodiversity falls.
1. What does the underlined word “decline” mean ?| A．Increase. | B．Drop. | C．Keep. | D．Double. |
| A．10%. | B．25%. | C．40%. | D．50%. |
| A．The oxygen in these areas is too low for the animals to live. |
| B．Ships are easy to break down and sink in these areas. |
| C．There are no animals living in these areas. |
| D．Many people died in these areas. |
| A．All animals living in the sea need oxygen. |
| B．Climate change can help cut down the dead zone. |
| C．Fish grow faster and better in low oxygen area. |
| D．Human activities have many bad effects on environment. |
| A．Dead zone in water is becoming larger. |
| B．Oxygen in water is necessary for sea animals. |
| C．The drop in ocean oxygen causes bad effects. |
| D．Low oxygen can cause the release of dangerous gas. |
8 . The undersea world is very beautiful. Now more and more people want to dive in the water to find the secrets there. Scuba diving is a new sport today. It can take you into a wonderful undersea world.
You will find many strange animals in the sea. Some are as large as a school bus. Many sea animals give out light in the dark and some have sharp teeth. During the day, there is enough light. Here, under the sea, everything is blue and green. When fish swim nearby, you can catch them with your hands. When you have bottles of air on your back, you can stay in deep water for a long time. However, you can’t dive too deep. And you must be very careful when you dive in deep water. The deep sea is not an easy place to live in. It’s cold, and it’s dark, too. The deeper it is, the less sunlight there is. At about 3,000 feet, there is no light at all. It is very dark in the sea. Many fishes have no eyes. Some have big eyes. A few have eyes on one side.
Besides the cold and the darkness, deep-sea animals face a third danger ― other animals. Animals eat! They must find food to eat. Many animals eat plants. However, some animals eat meat. This means these sea animals have two big jobs. They need to find animals as food, and they have to try not to become other animals’ meal.
1. Why do people want to dive in the sea?| A．Because they want to catch fish. |
| B．Because they want to find the secrets of the undersea world. |
| C．Because the sea is deep. |
| D．Because there are all kinds of plants in the sea. |
| A．can’t see anything bright |
| B．can’t be in danger |
| C．can catch nothing |
| D．can see everything is green and blue |
| A．One. |
| B．Two. |
| C．Three. |
| D．Four. |
| A．stay in deep water for a long time |
| B．dive very, very deep |
| C．live in deep water safely |
| D．dive freely without any dangers |
| A．One animal finds something to eat, and it may be eaten by others. |
| B．Animals in the sea must find food to eat. Many eat plants. However, some eat meat. |
| C．The deeper the sea is, the darker and colder it is. |
| D．At the depth of 3, 000 feet under the sea, all animals can find their way by seeing. |
9 . I stole your dog today. No, I didn’t set a foot on your house, but from the condition of your dog, I can imagine what it looks like…the word “rubbish” comes to mind.
I found her along a road, with a heavy chain wrapped around her neck, still attached to rotten boards from her doghouse. Not only did I know that most of the town people had already ignored her, judging by where I found her, but I knew that if she had gotten into the Woods, the “cross” that she dragged behind her would have wrapped around a tree until starvation or thirst killed her. She has a beautiful name now. Already in the first week she has come to look more like she should. Her eyes sparkle and she has learned to wag her tail in greeting. She has stopped flinching (畏缩) when I make a sudden movement, because she knows now that I won’t beat her, in fact, she rarely leaves my side. She’s even become brave enough to bark at a cat and today I watched from the window as she attempted to play with the other dogs. No, it’s clear she does not miss you or her former life on a chain.
It’s not clear yet whether she'll remain here or whether I’ll find her a loving home where she can count on more individual attention than I can give her, but one thing is certain, this is one bit of stolen “property” who is never returning to you. So sue me, accuse me, plead with the courts that she is rightfully yours ... I’m convinced this is the best “crime” I’ve ever committed. Hardly anything has pleased me more than the day I stole your dog. I need only look into her beautiful brown eyes to know that she’d defend my decision with her life. If we have one prayer, it is that you will not replace her, and if we have one special day to celebrate together, it is the day I stole your dog and the day she stole my heart.
1. What’s the author’s attitude towards the former owner of the dog?| A．Puzzled. | B．Angry. |
| C．Shocked. | D．Satisfied. |
| A．the dog is not lovely |
| B．the dog tried to find a kind master |
| C．the dog was treated badly by its former master |
| D．the author will be charged with stealing a dog |
| A．playing with other dogs | B．barking at a cat |
| C．not missing her former master | D．waving her tail to make greetings |
| A．He was afraid of being punished. |
| B．He thought he had to do it. |
| C．He believed that the law would allow him to do so. |
| D．He did it with pride. |
10 . If you were bringing friends home to visit, you could show them the way. You know the landmarks—a big red house or a bus-stop sign. But what if you were swimming in the middle of the Atlantic Ocean? Could you still find your way home? A loggerhead turtle（海 龟）could.
According to Dr. Ken Lohmann, loggerheads have a magnetic（磁力的）sense based on Earth’s magnetic field. It helps them locate the best spots for finding food and their home beaches.
Scientists already know that several other animals, such as whales and honeybees, can detect（探测到）magnetic fields. The difference between them and loggerheads, however, is the way they learn to use their magnetic sense. Young whales and honeybees can learn from adults. Loggerheads are abandoned as eggs.
As newborn loggerheads have no adults to learn from, what helps them figure out how to use their magnetic sense? Lohmann thinks one of the cues was light on the sea.
Baby loggerheads hatch only at night. However, a small amount of light reflects off the ocean. The light makes that region brighter. Heading toward the light helps them get quickly out to sea, where they can find food. Lohmann tested whether newborn loggerheads use this light source to set their magnetic “compasses”（罗盘）. He and his team put some newborns in a water tank and recorded which way they swam. Around the tank, the scientists created a magnetic field that matched the Earth’s. They set a weak light to the east of the magnetic field. Then they let the newborns go.
At first, the newborns swam toward the light. After the scientists turned off the light, the turtles that had seen the light in the east always swam toward east. When the researchers reversed（颠倒）the magnetic field, these turtles turned around and swam toward the new “east”.
This and the follow-up experiments all showed that loggerheads use light from the outside world to set their magnetic “compasses” and then remember the “correct” direction. If a turtle hatches on a brightly-lit beach, that would damage its magnetic sense forever and make survival hard for the turtle.
Lohmann’s work has led others to protect the habitat of this endangered species. Yet many questions about these creatures remain unanswered, and researchers have a lot to study.
1. Loggerheads and whales differ in the way they______.| A．bring up their young |
| B．recognize landmarks |
| C．detect magnetic fields |
| D．learn to find directions |
| A．Weak light reflected off the ocean. | B．Help from adult loggerheads. |
| C．Bright sunlight from the sky. | D．Food in warmer waters. |
| A．the light |
| B．the magnetic field |
| C．other unknown factors |
| D．the light and the magnetic field |
| A．It enables researchers to keep track of turtles. |
| B．It contributes to the studies of the magnetic field. |
| C．It offers a new solution to environmental pollution. |
| D．It helps protect the loggerheads’ living environment. |
| A．Experiments on Loggerheads |
| B．The Survival of the Sea Turtle |
| C．The Loggerhead’s Built-in “Compass” |
| D．Comparison of Loggerheads and Other Animals |
