It is bad to have food stuck between your teeth for long periods of time. This is because food attracts germs(细菌), 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 be also good for your heart.
It may seem strange that something your 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 these germs. For some reason, the way the body fight these mouth germs may end up weakening the heart over time.
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 sure to help your teeth. This is enough of a reason for everyone to floss their teeth every day. From the passage, we know that_____
| A．food stuck between your teeth may hurt your teeth |
| B．all of the doctors agree that flossing is good for your heart |
| C．doctors’ judgment about flossing is based on medical research |
| D．not every doctor thinks flossing helps to keep your teeth healthy |
The underlined sentence in Paragraph 3 is to____.
| A．Provide an example |
| B．Make a comparison |
| C．Introduce a new topic |
| D．Develop a previous statement |
Which of the following best states the main idea of the last paragraph?_______.
| A．It is a fact that flossing can help your heart as well as your teeth. |
| B．There is no good reason to believe that flossing will help your heart. |
| C．Because doctors find flossing won’t help your heart, it is useless to floss. |
| D．Even if flossing is only good for your teeth, you should still do it every day. |
Which is the best title for the passage?
| A．Flossing by Coincidence |
| B．How to Keep Your Teeth Healthy |
| C．Flossing Habits and Healthy Hearts |
| D．Why Doctors Disagree about Flossing |
The Washington post – NASA’s newest space habitat looks sort of like a kids’ moon bonce, a big, bright, inflatable globe that could be lots of fun to play in. Soon astronauts on the International Space Station could get the chance to try . The expandable habitat made by Bigelow Aerospace recently passed NASA’s strict certification requirements and is scheduled to be flown to the station in September.
Called the BEAM ( Bigelow Expandable Activity Module), the habitat would be attached to the space station, where it would stay for two years. While there, it would be tested to see how it handles the rigors of space – the radiation, the station’s movement and even how it stands up to the debris (碎片) flying around in orbit.
The private Las Vegas company, founded by millionaire real estate mogul(地产大亨) Robert Bigelow, won a $17.8 million contract from NASA to provide the module to the space station.
“Today is the first step, but it’s a big step,” said Bigelow’s George Zamka. Replace the space station or make it larger. It also hopes to build the habitats on the moon. Its B330 module would be even bigger, with 330 cubic meters of internal (内部的 ) space. The modules could be connected. Creating research facilities, the company says, or even space hotels.
In an interview ,NASA’s William Gerstenmaier, said he was eager to see how the module performs , and said he was especially pleased “ to see how the private sector can step up and help us meet our requirements.” The module will be flown to the space station by SpaceX, the first commercial company to resupply the space station.
What would be the best title for this passage?
| A．NASA’s space habitats flown to the station. |
| B．NASA’s space habitat it the station. |
| C．NASA’s new expandable space habitat. |
| D．NASA’s newest inflatable globe. |
Which of the following is TRUE according to the passage?
| A．NASA’s newest space habitat is a kids’ moon bounce. |
| B．Astronauts of Bigelow Aerospace could get the chance to try the space habitat. |
| C．NASA was founded by Robert Bigelow. |
| D．The B330 module to be built on the moon would be with an inside space of 330 cubic meters. |
The underlined word “rigors” in Paragraph 2 refers to “_________”.
| A．difficulties | B．environments |
| C．movements | D．changes |
The passage is most probably taken from ________.
| A．a newspaper | B．a booklet |
| C．a magazine | D．a science fiction |
The food we eat seems to have a great effect on our health. Although science has made big steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of human illness is related to food and forty percent of cancer is related to food as well. That food is related to illness is not a new discovery. In 1945, some researchers realized that things commonly used to keep colors in meats and other food additives (添加剂) caused cancer.
Yet, these additives remain in our food, and it is difficult to know which things on the wrappings（包装）of foods are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin (青霉素) to their animals, and because of this, penicillin has been found in the milk of cows. Sometimes similar things are supplied to animals not for their health, but just to make a profit.
The farmers are simply trying to fatten the animals in order to get a higher price on the market. Although some countries have tried to control such things, the practice continues.According to this passage, we can know _____.
| A．perhaps most kinds of cancer are related to what people eat |
| B．perhaps most of human illness is caused by what we eat |
| C．cancer was discovered in 1945 |
| D．science has made food unfit to eat |
Things that are used to keep colors in meats are _____.
| A．harmful | B．useless | C．helpless | D．dangerous |
People use additives _____.
| A．to make food more unfit to eat |
| B．to cause cancer |
| C．to change the color of the food |
| D．to take off the diseases of the food |
Which of the following is NOT true?
| A．Some wrappings of food are harmful. |
| B．Farmers try to make more money on the market by fattening their animals. |
| C．"The practice continues" means "things are still going on like that". |
| D．We needn't take care of what we eat. |
Du Kun，a Chinese boy is called“the youngest writer in the world．”He has written three books till now．Du Kun was born in Jiangsu in 1994．When he was 7 months old．his parents started working in over 30 different cities，such as xi’an and Shenzhen．This kind of life gave him things to think and write about．When he was 9 months old，he could speak and at the age of one，he could say five to six hundred words．At three，he could look up words in the dictionary．At four，his father taught him how to learn by himself．His parents like reading very much．So does he．At the age of 5，he began writing fairy tales．At the age of 6．he wrote a novel about his life in different cities with his parents．His fairy tales are all from his life．One day，he found many mice in the house．They not only ate their food but also hurt his mother’s hand．So he thought，“If we give mice the stomach of cows，they will eat grass and they will be helpful to people．”This was his first fairy tales Change Stomach for Mice．Now he studies well in a middle school．
He has written his third book．The novel called Eyes of Children．He says，“I am not different from other children，I just wrote several books．”Thanks to his________，Du Kun could write his books．
| A．mother | B．father |
| C．school life | D．life in different cities |
Du Kun began to use a dictionary，________．
| A．when he wrote fairy tales |
| B．before his father taught him how to learn something |
| C．after he went to school |
| D．after his mother taught him how to learn something |
The underlined sentence shows us that Du Kun________．
| A．is different from other children |
| B．doesn’t tell the truth |
| C．is the same as other children |
| D．likes his books |
Which is the best title?
| A．Three Books by a Child |
| B．How to Write a Fairy Tales |
| C．How Clever the Boy is |
| D．Du Kun the Youngest Writer |
| Timetable |
|
| Sunday 8:30---11:30 Personal Inventions Mr. Johnson You can see many inventions by the students; you may also bring your own inventions. |
Monday 19:00---21:00 Space and Man Dr. Thomas West If you want to know more about the universe (宇宙). |
| Wednesday 19:30---21:00 Modern Medicine Mrs. Lucy Green Would you like to know medical science? |
Friday 18:30---21:00 Computer Science Mr. Harry Morison from Harvard University, USA. Learn to use Windows XP. |
You may have a chance to introduce your inventions on ______.
| A．Sunday | B．Monday | C．Wednesday | D．Friday |
The person who teaches Computer Science is from______.
| A．Canada | B．Japan | C．Australia | D．America |
You may learn something about a disease called TB from ______.
| A．Dr. West | B．Mr. Morison |
| C．Mrs. Green | D．Mr. Thomas |
With all the wars, fighting and sadness in the world today, it's not only necessary, but also essential to have a good sense of humor just to help us get through each and every day of our lives. Putting a smile on someone's face when you know they are feeling down in the dumps ( 处于沮丧中), as the saying goes, makes me feel good and warms my heart.
How would you feel if you could not joke around with your wife, husband, child, co-worker, neighbor, close friend, or even just someone that you are standing in line with at your corner store? I am always saying things that make others smile or laugh, even if I don't know the person I'm joking around with. My Grandma always found humor in everything she did, even if it was the hardest job anyone could imagine. This not only relieves stress in any situation, but also is common courtesy (礼貌) to speak to others that are around you.
I know of a few people that don’t have a funny bone in their bodies, as they say. Everyone around them could be rolling on the floor after hearing a great joke and they would sit there without the slightest smile on their face. They don't get the joke that makes others laugh. I am busting a gut while they just sit there, looking at me as if I were from outer space. How can people not get a really funny joke?
Laughing is essential to keep your stress levels under control. Without humor we would find ourselves with a lot of psychological problems, or on a lot of medications to keep us from going crazy. There is too much sadness in this present world. It drives people crazy. We all need to find a way to bypass the sadness and bring a little light into our lives. So, I believe our best medicine is to get together and tell some jokes and have some fun laughing together.According to the author, humor is useful in the aspect that ____________.
| A．it makes people more confident |
| B．it can pick up people' s spirits |
| C．it can help rid the cruelty in the world |
| D．it can help people get on well with others |
The phrase “busting a gut" in the third paragraph can be replaced by __________.
| A．explaining carefully | B．speaking loud |
| C．keeping silent | D．laughing hard |
In writing the passage, the author mainly intends to __________.
| A．talk about his own understanding of humor |
| B．encourage people to be humorous in daily life |
| C．introduce a practical way to get through daily life |
| D．convince people of the power of being optimistic about life |
What is the author' s attitude towards the present world?
| A．Positive. | B．Critical. |
| C．Satisfied. | D．Indifferent. |
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