Although we already know a great deal about flu, and although the World Health Organization is constantly collecting detailed information from its chain of flu reference laboratories throughout the world, it is extremely difficult for epidemiologists, who study infectious diseases, to predict when and where the next flu epidemic will occur, and how serious it will be. 

There are three kinds of flu virus, known as A, B and C. flu C virus is relatively stable and causes mild infections that do not spread far through the population. The A and B types are unstable, and are responsible for the epidemics that cause frequent concern. Following any virus attack, the human body builds up antibodies（抗体）which can be changed into immunity to that type of virus but a virus with the ability to change its character is able to bypass this protection. Variability（可变性）is less developed in the flu B virus, which affects only human beings. As flu B virus may cause a widespread epidemic but will have little effect if introduced into the same community soon afterwards, since nearly everyone will have built up antibodies and will be immune. The flu A virus, which affects animals also, is extremely unstable and is responsible for some of the worst outbreaks of the disease, such as the world epidemic, of 1918&1919, when about half the world’s population were infected and about twenty million people died, some from pneumonia caused by the virus itself and some from secondary complication caused by bacteria. Accurate prediction is difficult because of the complication of the factors. A particular virus may be related to one  to which some of the population have partial involved immunity. The extent to which it will spread will depend on factors such as its own strength, or virulence（病毒性）, the ease with which it can be transmitted and the strength of the opposition it encounters（遇到）. Scientists, however, have a reliable general picture of the world situation. 

1．hich of the following is the most appropriate title for the passage? 

       A．Symptoms of Flu    B．Man Vs Flu Virus 

       C．WHO: The Major Organization against Flu Virus  D．Variability of Flu Virus 

2．hat does the author say about the flu B virus? 

       A．B Virus is relatively stable and causes mild infections that do not spread far through the population. 

       B．B Virus is unstable, and is responsible for the epidemics that cause frequent concern. 

       C．B virus is extremely unstable and is responsible for some of the worst outbreaks of the disease. 

       D．B virus has a very developed variability, and it affects only human beings. 

3Which of the following is NOT mentioned as a factor contributing to the extent to which a virus spreads?

       A．The strength of the virus.             

       B．The ease with which the virus can be transmitted.

       C．The strength of the opposition.      

       D．The immunity the virus can bring about.

4．his article is quite probably ________.

       A．a piece of news              B．a special science report

       C．an introduction to a disease    D．a scientific fiction 

阅读理解

　　There are many commonly held beliefs about eyeglasses and eyesight that are not proved to be facts．For example，some people believe that wearing glasses too soon weakens the eyes．But there is nothing to show that the structure of eyes is changed by wearing glasses at a young age．Wearing wrong glasses，however，can prove harmful．Studies show that only children can develop poor eyesight if they have wrong glasses． We have all heard of some of the myths（荒诞的说法）about how eyesight gets bad．Most people believe that reading in poor light causes poor eyesight，but that is untrue．Too little light makes the eyes work harder so they soon get tired and strained（疲劳）．Eyestrain also results from reading too long，reading in bed，or watching too much television．But，although eyestrain may cause some pains or headaches，it does not harm eyesight directly．Nevertheless，proper lighting，when reading or studying，is essential（基本的）to maintain（保持）good eyesight．

　　Another myth about eyes is that they can be transplanted．It is quite difficult to connect an eyeball to a new brain．And it is impossible to transplant a whole eyeball to another person．Only certain parts of the eye can be transplanted now． But if we keep clearing up the myths and learning more about the eyes，some day it may be possible to replace a full ball．

1．This passage mainly tells us that________．

[　　]

A．people have many wrong beliefs about eyes and eyesight

B．there are many things about the body that are not completely understood

C．there are several causes of eyestrain

D．eyes are important to people

2．Hoe many wrong beliefs about eyes and eyeglasses are mentioned in the passage？

[　　]

3．Perhaps the author believes that________．

[　　]

A．doctors are still learning things about eyesight

B．headaches are usually caused by eyestrain

C．people should wear glasses as soon as possible

D．people only believe things that are proved facts

4．“commonly held beliefs” in the first sentence means________．

[　　]

A．ideas that only low class people believe

B．ideas that most people believe

C．beliefs that have something in common

D．foolish beliefs

5．hat does the word“transplant”mean？

[　　]

A．To transport from one place to another

B．To translate from one part to another part．

C．To move from one part of the body to another

D．To change one form to another

One morning more than thirty years ago, I entered the Track Kitchen, a restaurant where everyone from the humbles(卑微的) to the most powerful came for breakfast. I noticed an empty chair next to an elderly, unshaven man, who looked somewhat disheveled. He was wearing a worn-out hat and was alone. I asked if I might join him. He agreed quietly and I sat down to have my breakfast.

We cautiously began a conversation and sopke about a wide range of things. We never introduced ourselves.  I was concerned that he might have no money and not be able to afford something to eat. So as I rose to go back to the counter and buy a second cup of coffee,  I  asked.

“ May I get you something?”

“A coffee would be nice.” Then I bought him a cup of coffee. We talked more, and he accepted another cup of coffee. Finally, I rose to leave, wished him well, and headed for the exit, at the door I met one of my friends. He asked.

“How did you get to know Mr. Galbreath?”

“Who?”

“The man you were sitting with. He is chairman of the Board of Churchill Downs.”

I could hardly believe it. I way buying, offering a free breakfast, and feeling pity for one of the world’s richest and most powerful men!

My few minutes with Mr. Glbreath changed my life. Now I try to treat everyone with respect, no matter who I think they are, and to meet another human being with kindness and sincerity.

What does the underlined word”disheveled’ mean?

  A. Unfriendly        B. Untidy.        C. Gentle.          D. Kind.

The author bought coffee for the old man because ______.

  A. he thought the old man was poor      B. he wanted to start a conversation

  C. he intended to show his politeness     C. he would like to thank the old man

How did the authr probably feel after he talked with his friend?

  A. Proud.          B. Pitiful.          C, Surprised.      D. Regretful.

What is the message mainly expressed in the story?

  A. We should learn to be generous.         

B. It is honorable to help those in need.

 C. People in high positions are not like what we expect.

  D. We should avoid judging people by their appearances.