TUVALU, a tiny country in the Pacific Ocean, has asked for help as it fears it will be swallowed up by the sea.Storms and huge waves are a constant threat and none of Tuvalu’s nine little islands is more than five meters above sea level, Salt water is already entering the country’s drinking water supply, as well as damaging plants that produce fruit and vegetable.__51___
___52___. Venice, a historic city in Italy best known for its canals, has sunk about 24 cm over the past 100 years. Experts say that it will have sunk another 20-50cm by 2050. A century ago, St. Mark’s Square, the lowest point in the city, floodedd about nine times a year, Nowadays, it happens more than 100 times. While Venice is slowly sinking into the mud on which it stands, Tuvalu’s rising sea level is caused by global warming.
The average global temperature has increased by almost 0.5 centigrade degrees over the past century; scientists expect it to rise by extra 1-3 degrees over the next 100 years.
Warmer weather makes glaciersmelt, adding more water to the ocean. The warmer temperatures also make water expand, so it takes up more space, causing the sea level to rise. The sea level has risen about 10－25 cm in the last 100 years.
___53___. Through burning coal, oil and gas, people have been increasing the greenhouse gases in the atmosphere, such as CO2. This adds to the power of the greenhouse effect, making the planet even warmer.
Many scientists believe that, if the warming is not stopped, there will be huge climate changes.___54____.____55____, the sea will swallow up millions of homes and the world will be flooded with “climate refugees” looking for somewhere to live.
| A．The main cause of global warming is human pollution |
| B．Should this come true |
| C．Without urgent help, the country’s days are numbered. |
| D．But Tuvalu is not the first place to face sinking into the sea |
E. The sea level could rise by one meter this century.
F. people face a lot of pollution.
G. much has been done about our planet .
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Taking a math test can be pretty stressful. Even if you know the material, you can still get the problem wrong. Knowing how to go through your math test and check your work can save you from handing in a test full of mistakes that can be avoided.
Write it out
You can also check a math problem by writing everything out on paper. Writing out math problems reduces your chances of missing anything to the lowest possible level, which is a common cause of incorrect answers.
Make sure your answers work by doing the opposite procedure of what your problem calls for, including the answer you got the first time around. In other words, you would use the opposite of this addition problem—subtraction (减法)—to determine whether or not your answer is the correct one.
Plugging in
You may find that a variable(变量) isn’t good enough or have a problem where you have to solve for a variable. This is the only real way to assure yourself that the answer you’ve found is correct.
Check for a reasonable answerFor example, if you get an answer in the millions and you know it should be in the thousands, you’ve likely misplaced a point. Go back through the work on your paper to make sure all of your formulas and calculations are correct. If everything looks okay, do the problem again and compare the result of the second try to what you’ve got on the first try.
| A．Do the opposite |
| B．Correct the answers |
| C．Plug the variable in the equation (方程) to check it out. |
| D．Therefore you’ll improve your grades, as well as your math skills. |
E. It also helps you to figure out everything after you have already finished the test.
F. If the result of a problem seems to make no sense, it indicates that the answer is incorrect.
G. This helps you to know what information you have and what information you need to solve.
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Mary: Well, Susan, how was your shopping trip with Nancy this afternoon?
Susan: Don’t ask.
Mary: What do you mean? Something went wrong?
Susan: Went wrong? Nancy thought I had said I would meet her at the department store at 2:30 when I really said 2:00. Then she thought we would meet at the main entrance in front when I really said at the east entrance on the Twelfth Street.
Mary:
Susan: Yes! I had given up waiting and went inside the women’s clothing department. So did she. Thus we met finally and it was 3:00 by then.
Mary: Did you get what you wanted?
Susan: A blouse, as a matter of fact. But by that time, all those on sale were gone. So I settled for a skirt.
| A. Did you ever find each other? B. But it was magical! C. Actually, I’ve got the list ready. D. I remember you said you wanted to get a sweater. E. Did you get anything? F. It could even be a disaster! G. I don’t want to talk about it anymore. |
Kids love to go online. There is so much to explore and learn.The answer to the question is as difficult as determining at what age a child can be left at home by themselves, since all children are different. Here are some questions to ask yourself to determine what is right for your child.
Of course when you are trying to determine if your can let him or her go online, your child has probably already said, “I’m ready；I can handle it”. But are they? __________ How would they handle the material if they ran across it by accident?
Does your child question other people’s actions? Do they easily believe anything that is presented to them? It is an important question to ask to determine if your child is ready to go online alone.
Have you taught them what the dangers are?Have you explained to them that there are people out there that might want to do them harm? It is a dangerous world out there. If you are going to let them wander around in the online world, they need to be prepared for what they might see or run into.
| A．Is your child easy to cheat? |
| B．There are a lot of dangers online. |
| C．Are they ready to go online by themselves? |
| D．Is your child skilled in using a computer? |
E. Unfortunately there is a lot of unpleasant material online.
F. At what age should you allow your child to go online alone?
G. You may be thinking this is a strange question to ask yourself.
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Body language is the quiet, secret and most powerful language of all. It is said that our body movements communicate about 50% of what we really mean while words themselves only express 7%. So , while your mouth is closed, just what is your body saying….
Arms if you keep your arms to the sides of your body or behind your back, this suggests you are not afraid of taking on whatever comes your way.
if someone upsets you, just cross your arms to show you’re unhappy.
Head. When you want to appear confident, keep your head level. If you are monitor in class, you can take on this position when you want your words to be taken seriously .
_
Legs. Your legs tend to move around a lot more than normal when you are nervous or telling lies. If you are at interviews, try to keep them still.
Posture. A good posture makes you feel better about yourself. This makes breathing more difficult, which in turn can make you feel nervous or uncomfortable.
Mouth. When you are thinking , you often purse your lips (撅着嘴). You might also use this position to hold back all angry comment you don’t wish to show. .
| A．If you are feeling down, you normally don’t sit straight, with your shoulders inwards |
| B．If you are pleased, your usually open your eyes wide and people can notice this |
| C．Outgoing people generally use their arms with big movements, while quieter people keep them close to their bodies. |
| D．How you hold your arms shows how open and receptive you are to people you meet. |
E. However, it will probably still be noticed, and people will know you’re not pleased.
F. However , to be friendly in listening or speaking, you must move your head a little to one side.
G. Don’t say too much when you’re happy.
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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．You should improve your mother tongue before you go. |
| B．Why do it? |
| 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.