It is bad to have food stuck between your teeth for long periods of time. This is because food attracts germs; germs produce acid, and acid hurts your teeth and gums. Flossing (使用牙线) helps to remove the food that gets stuck between your teeth. This explains why flossing helps to keep your mouth healthy, but some doctors say that flossing can also be good for your heart.

    It may seem strange that something you do for your teeth can have any effect on your heart. Doctors have come up with a few ideas about how flossing works to keep your heart healthy. One idea is that the germs that hurt your teeth can leave the mouth and travel into your blood.Germs that get into the blood can then attack your heart. Another idea is based on the fact that when there are too many germs in your mouth, the body tries to fight against there germs. For some reason, the way the body fights these mouth germs may end up weakening the heart overtime.

    Not every doctor agrees about these ideas. Some doctors think that the link between good flossing habits and good heart health is only a coincidence. The incidence (发生率) of two or more events is completely random, as they do not admit of any reliable cause and effect relationship between them. For example, every time I wash my car, it rains. This does not mean that when I wash my car, I somehow change the weather. This is only a coincidence. Similarly, some doctors think that people who have bad flossing habits just happen to also have heart problems, and people who have good flossing habits just happen to have healthy hearts.

    The theory that flossing your teeth helps to keep your heart healthy might not be true. But every doctor agrees that flossing is a great way to keep your teeth healthy. So even if flossing does not help your heart, it is true to help your teeth. This is enough of a reason for everyone to floss their teeth every day.

    In England, people are fond of sport. In other words, lots of English people like the idea of sport and watch sport on TV. But the number who take part in sport is quite small. On the whole, English people prefer to be fat rather than be thin.

    The most popular sport in England is football. Football is played on Saturday afternoon in most towns and the supporters of a certain team will travel from one end of the country to the other to see their team play. There are four divisions(级别) of the football league. Not surprisingly the best teams are in the first division. But the best supporters are often in the fourth division. You have to be a good supporter to watch the fourth division football!

    Many other sports are also played in England, such as golf, in which you try to knock a ball into a hole; basketball, in which you try to get a ball through a net; tennis, in which you try to hit a ball so that your opponent(对手) can not hit it. As you see, if the ball had not been invented, there would have been no sport.

    Actually, that is not quite true. Athletics(田径) isn't played with a ball, nor horse-racing. Perhaps that is why they are not as popular as football!

    Let children learn to judge their work.{#blank#}1{#/blank#} If corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make the necessary changes to make his language like other people's.{#blank#}2{#/blank#}They learn to do without being taught to walk, run, climb, whistle, ride a bicycle, compare their own performances with those of more skilled people, and slowly make the needed changes.

    But in school we never give a chance to find out his mistakes and correct them by himself.{#blank#}3{#/blank#} We act as if we thought that he would never notice a mistake unless it was pointed out to him, or correct it unless he was made to. Let him work out, with the help of other children if he wants it, what this word says, what the answer is to that problem, whether this is a good way of saying or doing this or not.

    If it is a matter of the right answer, as it may be in mathematics or science, give him the answer book.{#blank#}4{#/blank#}Why should we teachers waste time on such routine work?{#blank#}5{#/blank#} Let the children learn what all educated people must some day learn, how to measure their own understanding, and how to know what they know or do not know.

A. Children leant to do all the other things in the same way.

B. Let him correct his own papers.

C. Point out his mistakes.

D. We do it all for him.

E. We allow him to learn from other children.

F. A child learning to talk does not learn by being corrected all the time.

G. Our job should be to help the child when he tells us that he can't find the way to get the right answer.

    A punctual person is in the habit of doing a thing at the correct time and is never late for anything.

    An unpunctual man never does what he has to do at the right time. He is always in a hurry and in the end loses both time and his good name. A lost thing may be found again, but lost time can never be got back. Time is more valuable than material things. In fact, time is life itself. An unpunctual person is always wasting his most important things as well as others'. An unpunctual person is always saying unhappily that he finds no time to answer letters or return calls. But the man who really has much to do is very careful of his time. He knows that he cannot finish all his work unless he carefully does every piece of work.

    Being unpunctual is the sign of disrespect towards others. If a person is invited to dinner and arrives later than the time when he should be there, he keeps all other guests waiting for him. Usually this will be thought as a great disrespect for the host and all the other guests.

    Not like a punctual person, an unpunctual one cannot do his duty wonderfully, whether it is public or personal. Imagine how it would be if those who should do important tasks failed to be on time. A man who is known to be unpunctual is never believed by his friends or fellow men.

                                                                        How to read more and learn more

    Today, more and more Chinese people enjoy sending and receiving messages on the phone. It can help them to get some information and communicate with friends. But I think I should read more books besides the textbooks, the more, the better. It can broaden（扩大）my mind and improve my language skills. {#blank#}1{#/blank#} Here are some tips for you.

    Clear your purpose for reading.

    {#blank#}2{#/blank#} Most people read for two main reasons, pleasure or knowledge. Clearing about your reading purpose can not only help you choose the books you really need to read, but also remind you why reading the book is important to you.

    {#blank#}3{#/blank#}

    No matter what you are reading, it is important to enjoy what you read. Although your friends like reading some kinds of books, those books might not be the ones you enjoy.

    Give up books that you don't enjoy.

    You may have chosen books that you are interested in, and they are right purpose. But while you are reading them, there may still be some books that you don't enjoy reading. Whenever you realize that you aren't enjoying the book you are reading, give it up. {#blank#}4{#/blank#}

    Set a reading goal.

    It is interesting that I read the books borrowed from libraries faster than than those I bought. The reason is the books I bought don't have a due date! I don't need to return those books. {#blank#}5{#/blank#} Before you read each book, ask yourself what time you need to complete this book by.

A. Read only what you are interested in.

B. Read the books borrowed from others.

C. Remember reading shouldn't be a chore (烦恼事).

D. Of course, it also can help me to get good grades.

E. We need to get the latest news and communicate with friends.

F. Before you start reading, ask yourself why you are reading this book.

G. Having a reading goal helps you work out how much reading you need to do in a week or even a day.

Do you know of anyone who uses the truth to deceive? When someone tells you something that is true, but leaves out important information that should be included, he can give you a false picture.

For example, some might say, "I just won a hundred dollars on the lottery. It was great. I took that dollar ticket back to the store and turned it in for one hundred dollars!"

This guy's a winner, right? Maybe, maybe not. In fact, he bought $200 worth of tickets. He's really a big loser!

He didn't say anything that was false, but he left out important information on purpose. That's called a half-truth. Half-truths are not technically lies, but they are just dishonest.

Some politicians often use this trick. During Governor Smith's last term, her state lost one million jobs and gained three million jobs. Then she seeks another term. One of her opponents says, "During Governor Smith's term, the state lost one million jobs!" That's true. However, an honest statement would have been, "During Governor Smith's term, the state had a net gain of two million jobs."

Advertisers will sometimes use half-truths. It's against the law to make false statements sol they try to mislead you with the truth. An advertisement might say, "Nine out of ten doctors advised their patients to take Yucky Pills to cure toothache." It fails to mention that they only asked ten doctors and nine of them work for the Yucky Company.

This kind of deception happens too often. It's a sad fact of life: Lies are lies, and sometimes the truth can lie as well.