Most people regard zoos as safe places for animals, where struggles such as difficulty finding food and avoiding predators（捕食性动物） don't exist. Without such problems, animals in zoos should live to a ripe old age. But that may not be true for the largest land animals on Earth. Scientists have known that elephants in zoos often develop diseases, joint problems and behavior changes. Sometimes, they even become unable to have babies.

To learn more about how captivity(监禁) affects elephants, a team of international scientists led by Mason, a biologist, compared the life spans of female elephants born in zoos with female elephants living outdoors in the wild. Zoos keep detailed records of all the animals in their care, documenting factors such as birth dates, illnesses, weight and death. These records made it possible for the researchers to analyze 40 years of data on 800 elephants in zoos.

The team found that female elephants born in zoos lived an average of 16.9 years. Their wild counterparts（同类事物） who died of natural causes lived an average of 56 years——more than three times as long.

Scientists don't yet know for sure why wild elephants seem to live so much better than their zoo-raised counterparts. Mason thinks stress and obesity(肥胖) may be to blame. Zoo elephants don't get the same kind of exercise as they do in the wild, and most are very fat. Elephant social lives are also much different in zoos than in the wild, where they live in large groups.

Another finding from the study showed that elephants born in zoos were more likely to die earlier than elephants captured in the wild and brought to zoos. Mason suggests stress in the mothers in zoos might cause them to have babies that are less likely to survive.

The study raises some questions about acquiring more elephants to keep in zoos. While some threatened and endangered species living in zoos reproduce successfully and keep healthy populations, that doesn't appear to be the case with elephants.

1.The text tells us that zoo elephants are different from other zoo animals because they________

2.What do the scientists find in their research?

3.Which of the following does the author suggest in the last paragraph?

4.Which of the following can be the best title?

The effects of air pollution on natural conditions have been a disturbing problem for many years. Some scientists hold the view that the air inside houses may be more dangerous than the air outside. It may even be one hundred times worse.

Most scientists agree that every modern house has some kind of indoor pollution, which can cause a person to feel tired, to suffer eye pain, headache and other problems. Believe it or not, some pollutants can cause breathing diseases of blood and even cancer.

What made us feel relieved is that there’s growing concern about the problem now. It is true that when builders began constructing houses and offices they did not want to waste energy. To do this they built buildings that prevented or limited the flow of air between inside and outside. For the same purpose, man-made building materials were employed to build houses, which are now known to let out some harmful gases.

Facing the serious challenge, scientists have been searching for a way to handle the problem. To everyone’s delight, they discovered a natural pollution control system for building—green plants, though they do not really know how plants control air pollution. Scientists suppose that a plant’s leaves absorb or take in the pollutants and in exchange gives out oxygen through its leaves and tiny organizations on its roots. Therefore they recommend that all buildings should have one large plant or several small plants inside for every nine square meters of space. Because studies indicate that different plants absorb different chemicals, the most effective way to clean the air is to use different kinds of plants. In conclusion, having green plants inside your house can make it a prettier and healthier place. Why not try?

1.Which of the following statements is TRUR?

2.According to scientists, some kind of indoor pollution can be found in ________.

3.What does the underlined part “To do this” refer to in Para3?

4.The reason why we should use different kinds of plants to clean the air is that ___.

American Watersports Tuesday-Saturday

Located on the beach of the Sea Gardens Beach Resort, there are fun things to

rent for the whole family. They offer rentals for kayaks, jet skis, and even parasail!

Enjoy the water up-close or from a bird’s eye view! No matter what activity you’re

enjoying, be sure to protect yourself and your family from the sun’s powerful rays and  apply plenty of sun block!

15^th Street Boat Company Monday-Saturday

15^th Street Boat Company offers rental boats of all kinds. They’re sure to have what you are looking for, whether it’s a small boat for a quick and simple outing or an extravagant boat with comfortable seats with a stereo and high tech navigation. You can rent a boat for half a day or a couple of days, or even weeks at a time. If you want it, they’ve got it. It’s fun for everyone!

Coconut’s Watersports 9am-5pm Monday-Sunday

Coconut’s Watersports is open 7 days a week and offers tons of water fun for the whole family. Jet Ski activities last 30 minutes or 1 hour and can make stops along the way. You must be at least 14 years of age to ride alone and can be as young as 3 to ride along with an adult. Everybody is required to wear a life jacket and a license is required to operate the Jet Ski. Bathing suits and shorts are recommended.

Jet Ski Tours of Miami 10am-7pm Thursday-Sunday

Jet Ski Tours of Miami includes onsite parking, indoor restrooms, lockers, and life jackets for participants. You may choose a one or two tour and each Jet Ski can hold up to 3 people. You must be at least 18 years old in order to ride. As long as you are accompanied by an adult, there is no age limitation for any passenger. There is a restaurant nearby to eat at. The tour visits 6 different islands and passes by Bayside and Hard Rock. You may even catch sight of dolphins, turtles or a crab resting in these splendid Florida waters.

1.You should especially protect yourself from sun burnt while visiting______.

2.Which of the following can help you enjoy sailing a boat?

3.What’s a must to ride alone in the Jet Ski activities?

4.What will you do to satisfy your son’s curiosity about sea animals?

Roughly speaking, teachers in traditional education may feel that students are too young to know much about the world, and have to be told what to do most of the time. By contrast, open education offers teachers quite different feelings. Students are expected to be responsible for their own education—to discover subjects by themselves instead of being made to study them. This way of teaching allows the students to grow independently and to develop their own interests in many subjects. Some students who do badly in a traditional classroom will be happier in an open classroom and enjoy learning. They will not have to worry about grades or rules at all.

However, many students won’t do well in an open classroom. For these students, they will do little in school if there are too few rules. They will not make good use of open education, which is so different from traditional class, because they may have a problem getting used to making so many choices on their own. For them it is important to have some rules to direct them. They may worry about the rules even when there are no rules. In addition to that, some traditional teachers do not believe in open education and do not like it either.

Since both of some good points and bad points of the open education have been explained clearly, you may have your own opinion on the issue. Personally, I think that the concept of open education is good only in theory. In actual fact, it may not work very well in a real class or school. I believe, most students, but of course not all students, need some structure in their classes. They may want and need to have rules.

In some cases, they must be made to study some subjects. Many students are pleased to find subjects they have to study interesting. They would not study those subjects if they did not have to.

1.Open education allows the students to_________________.

2.Open education may be a good idea for the students who __________.

3.Some students will do little in an open classroom because___________.

4.Which of the following best summarizes the passage?

When I wandered along a path through woods in the countryside, a small water pool came into my sight ahead. I changed my direction and took the part of the path that wasn’t covered by water or mud to go around it. When I reached the pool, I was suddenly attacked by something several times! It was from somewhere totally unexpected. I was surprised as well as unhurt. The attacker stopped attacking me when I backed up a foot. I couldn’t help laughing when I looked down and found I was being attacked by a butterfly!  

Curiously, I took a step forward to see clearly. My attacker dashed towards me again. He rushed towards me at full speed, attempting to hurt me but failed. For a second time, I took a stop backwards when the attacker paused. I didn’t know what to do. After all, it’s just uncommon that one is attacked by a butterfly. I stepped back to look the situation over. My attacker moved back to land on the ground. That’s when I discovered why the attacker was kept charging me. He had a mate and she was dying.

Sitting tenderly close beside her, he opened and closed his wings as if to fan her. I could do nothing but admire the love and courage of that butterfly in his concern for his mate. He had attacked me for his mate’s sake, even though she was clearly dying and I was much larger than he. He did so just to give her those extra few precious moments of life. I shouldn’t have been careless enough to step on her. His courage in attacking something thousands of times larger and heavier than himself just for his mates’ safety seemed admirable. I was moved and rewarded him by walking on the more difficult side of the pool, leaving them undisturbed. He had truly earned those moments to be with his dear mate.

Since then, I’ve always tried to remember the courage of that butterfly whenever I see huge barriers facing me.

1.Why did the writer change his direction while walking down a path?

2.What made the man feel funny?

3.From this experience the man learned _____.

4.Which of the following word can best describe the butterfly?

It is you rather than Lucy who ____ for the accident.

With so many problems ____, the new government is in rather a difficult situation.

While the computer becomes more and more powerful, I don’t think it will completely ___________ teachers in class.

Karan rented a _________ flat and had it _______ pink for the coming Christmas.

---How do you find James Cameron's 3D version of Titanic?

---Fantastic! It can't be _______ and has brought us a wonderful experience.