根据短文内容，从下边的A—F选项中选出能概括每一段主题的最佳选项。选项中有一项为多余选项。
A . The different structure of blue holes.
B. Why scientists are interested in blue holes.
C. How a blue hole comes into being.
D. Blue holes exploring is becoming popular.
E. Rules to obey when diving into blue holes.
F. The general definition of a blue hole.______________
A blue hole is a flooded sea cave with a hole that opens up at the land's surface. These cave systems form in carbonate rock, often on islands. Some blue holes have very special rock formations and water chemistry. Far below sea level, they contain some of the harshest environments on Earth, with no oxygen and no light. Yet these areas are filled with life forms that have adapted to the extreme conditions.___________
Blue holes get their name from the color some have when seen from the air. The color is usually a reflection of the sky on the water. Blue holes are the result of erosion in which water breaks down rock. Rain falling thousands of years ago contained chemicals which slowly wore away at the limestone landmass. These holes later filled with sea water as the sea level changed. The rising and falling of sea levels and the mixture of salt and fresh water further wore away at these cave formations. ____________
These flooded cave systems can be found in the ocean, or they can be found inland. Ocean caves are affected by tides, so they always have water movement. But blue holes on land are very still. They have several layers of water, chemicals, and bacteria. The top layer of fresh water comes from rainfall. This layer acts like a cap on top of the layered mixture, and keeps out oxygen from the atmosphere. The fresh water floats on a denser layer of saltwater. Underneath this is a layer of poisonous hydrogen sulfide, produced by bacteria living in the water. Underneath this layer is anoxic seawater -- water that does not contain any oxygen.___________
Information gathered from these blue holes is helping scientists to increase their understanding of biology, archaeology and geology. But exploring these blue hole environments brings danger as well as discovery. Scientists are interested in these caves because oxygen-free conditions there are similar to those on Earth long ago, before oxygen existed on our planet. But there are many difficulties involved in diving into blue holes. ___________
One reason blue holes have not been fully explored is that they can be extremely dangerous. There are many safety rules that divers must follow to help ensure their survival. First, divers must have training and experience to swim in these caves. Divers who explore a cave for the first time must establish a thin rope called a guideline. This line helps them to safely enter and exit the cave without getting lost.
From time to time, we all get a bit down. Maybe we are feeling bad because we’re not doing well with our goals. There are many reasons for feeling down, but I’m not able to discuss all of them. ______
Make a list. Sometimes we are sad simply because we are troubled by all the things we have to do. ______ Make a list of the most pressing things you have to do. Thus you’re getting things under control. You can see, right in front of you, what you need to do, and that can pick up your mood.
______ You’ve made a list, and you still feel puzzled? Well, get started on the first thing you need to do. Once you get into action, you’ll feel better. And once you start doing something, you will feel much better than lying around feeling sorry for yourself.
______ I like Brown Eyed Girl, the Kinks, the Ramones, or an upbeat Beatles tune. You might have your own brand of feel-good music. Whatever it is, let yourself move to the beat. It may just be what the doctor ordered.
Talk about it. Get a best friend, family member or coworker you can talk to. ________ It can also help you work out the reasons you’re feeling down.
| A．Take action. |
| B．Play some lively music. |
| C．Get out of the house and do something. |
| D．Getting things off your chest makes a big difference. |
E. Start simply by picking up a piece of paper and a pen.
F. Do whatever you need to do to feel good about yourself.
G. What I can talk about are some things that have worked for me.
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Everyone needs a break, and vacations are not meant for serious study. ____ The Spring Festival is coming up so this is the perfect time to discuss some great English language literature to take on a long train journey.
Before getting into the recommendations, you need to determine your English reading comprehension level. If you’re at the beginner level, there are two options: reading a children’s book or reading a book that you’ve read in Chinese translation. ____ If you’re at the intermediate level, popular books like pop fiction, mysteries and thrillers are good options. For advanced readers, classic works of literature or modern prize winners (Nobel, Pulitzer) are good options.
____ When I pick up a book I like, even though the first few chapters are really hard to get through, I would try to get accustomed to the language the author uses. Generally, after the first few chapters, things get a lot easier, especially if I get involved in the story.
Another great way to keep yourself motivated is to find a friend who’s interested in reading the same book. You can make goals that you both want to achieve. ____
Some quick recommendations: Harry Potter, start with the first book and go on from there; the Narnia series; anything by US writer Michael Crichton; and if you like horror, US writer Stephen King is always unusual and fun. ____ Happy reading!
| A．If you pick a book which is so challenging, it will be too stressful. |
| B．The most important thing is to pick a book that you’re really interested in. |
| C．You may also enjoy your reading when hanging out with your family. |
| D．You should just find a topic or author you’re interested in, and the rest will go from there. |
E. You can also discuss plot lines or vocabulary issues with each other by SMS or e-mail.
F. Instead, they’re a great way to take a break and enjoy a good book.
G. This will help you get over any unfamiliar words or phrases, since you’re already familiar with the story.
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。
Choosing to Study Overseas
Every year, thousands of students choose to study in another country for a semester, the summer, or a year. Studying overseas can be an exciting experience for many people.
Living in another country can help you to learn a language, and about another culture.
Overseas study may also look good on your future resume. Many companies today want employees who speak a second language, or have experienced living or working in another country.
Making the right choice
Once you decide to study overseas, you have to make some choices. To choose the right country or school. Ask yourself: Where do I want to go and why? How much do I want to pay? Do I want to live with a host family, with roommates, or alone?
Getting ready to go
Get your passport and visa early! Learn about the money. Bring some of it, and a credit card, with you.
Once you are there
After the first few weeks overseas, many students will feel a little homesick. They may miss their family, friends, and familiar ways of doing things. When you feel sad or homesick, try to talk to others, or write about your feelings in a notebook.
| A．Why do it? |
| B．You should improve your mother tongue before you go. |
| C．Large number of students can’t afford to study overseas. |
| D．How long do I want to study overseas? |
E. Remember that it takes time to get used to a new place, school, and culture.
F. You will see the world in a new way, and learn more about yourself.
G. Before you go, learn some of the language, and read about some common customs in your host country.
根据短文内容，选出能概括每一段主题的最佳选项。选项中有一项为多余选项。
| A. Travel as often as possible B. Provide great value to the world C. Work hard and face great challenges D. Make the very best of every situation E. Spend time with friends who improve you F. Work on something every day that moves you |
Everyone hopes to live a long life. But how can you make your long life happy and meaningful? You can read on to find answers. Go traveling wherever you want and go to see one part of the world you’ve never seen before. You will not regret it. Traveling has less to do with seeing things, as it does with experiencing them. It has less to do with discovering something, as it does with discovering yourself. You run into all the good things and bad things about yourself on a daily basis if you travel to new places, and you are provided with the opportunity to grow far beyond your years.
You can go through life and make new friends anytime, but no one can take the place of those persons who truly improve you. They are the most important people you will ever meet because they tear down the invisible walls you have built in your mind. In other words, they come into your life and help you develop your potential that you would never have been aware of without them.
The road to greatness is far from easy. You can be absolutely certain that when you feel you are getting weaker from struggle, you are in fact growing stronger than you ever have been before. The more difficulties you meet and solve on your lifelong journey, the more meaningful your life story will be.
One of the great secrets of happiness is freedom, and the secret of freedom is doing the best you can with what it done to you. It’s all about how you choose to respond to different situations. This simple choice makes a world of difference. If you find your situations tolerable, by all means tolerate them; if you find them intolerable, break through them. Eventually you are free because you alone are responsible for your thoughts and how you use them to improve your growth.
The best way to get ahead in this world is not to complete with others, but to serve them. If you want to get a promotion at work, be good to your boss. If you want to build a successful business, be of service to your potential customers. Provide unmistakable value. Value is what makes relationships, businesses, and personal efforts grow. At any age, in any situation, for every possible life path, there is value you can provide. Success and happiness will come when you choose to work for the world.
根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
There is distinction between reading for information and reading for understanding. _________
The first sense is the one in which we read newspapers, magazines, or anything else. _________ Such materials may increase our store of information, but they cannot improve our understanding. And clearly we don’t have any difficulty in gaining the new information, for our understanding was equal to them before we started. Otherwise, we would have felt the shock of puzzlement.
The second sense is the one in which we read something that at first we do not completely understand. Here the thing to be read is at the first sight better or higher than the reader. The writer is communicating something that can increase the reader’s understanding. __________ Otherwise one person could never learn from another. Here “learning” means understanding more, not remembering more information.
What are the conditions in this kind of reading? First, there is inequality in understanding. __________ Besides, his book must convey something he possesses and his potential readers lack. Second, the reader must be able to overcome this inequality in some degree. And he should always try to reach the same level of understanding with the writer. If the equality is approached, success of communication is achieved.
__________ It is the least demanding and requires the least amount of effort. Everyone who knows how to read can read for entertainment if he wants to. In fact, any book that can be read for understanding or information can probably be read for entertainment as well.
| A．The writer should have a better communicating skill. |
| B．Such communication between unequals must be possible. |
| C．We can get access to the content of those materials easily. |
| D．The writer must be “superior” to the reader in understanding. |
E. Thus, we can employ the word “reading” in two distinct senses.
F. Reading for entertainment is capable of increasing our understanding for information.
G. Besides gaining information and understanding, there’s another goal of reading—entertainment.
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