Unless we spend money spotting and preventing asteroids(小行星) now, one might crash into Early and destroy life as we know it, say some scientists.

Asteroids are bigger versions of the meteoroids(流星) that race across the night sky. Most orbit the sun far from Earth and don’t threaten us. But there are also thousands of asteroids whose orbits put them on a collision course with Earth.

Buy $50 million worth of new telescopes right now. Then spend $10 million a year for the next 25 years to locate most of the space rocks. By the time we spot a fatal one, the scientists say, we’ll have a way to change its course.

Some scientists favor pushing asteroids off course with nuclear weapons.  But the cost wouldn’t be cheap. Is is worth it? Two things experts consider when judging any risk are: (1)How likely the event is; and (2) How bad the consequences if the event occurs. Experts think an asteroid big enough to destroy lots of life might strike Earth once every 500 000 years. Sounds pretty rare-but if one did fall, it would be the end of the world. “If we don’t take care of these asteroids, they’ll take care of us,”says one scientist.  “It’s that simple.”

 The cure, though, might be worse than the disease. Do we really want fleets of nuclear weapons sitting around on Earth? “The world has less to fear from doomsday(世界末日) rocks than from a great nuclear fleet set against it,” said a New York Times article.

9.What does the passage say about asteroids and meteoroids?

A.They are heavenly bodies different in composition.

  B.They are heavenly bodies similar in nature.

C.There are more asteroids than meteoroids.

D.Asteroids are more mysterious than meteoroids.

10.What do scientists say about the collision of an asteroid with Earth?

A.It is very unlikely but the danger exists.

B.Such a collision might occur once every 25 years.

C.Coilisions of smaller asteroids with Earth occur more often than expected.

  D.lt’s still too early to say whether such a collision might occur.

11.What do people think of the suggestion of using nuclear weapons to alter the course of asteroids?

A.It sounds practical but it may not solve the problem.

B.It may create more problems than it might slove.

C.It is a waste of money because a collision of asteroids with Earth is very unlikely.

D.Further research should be done before it is proved applicable.

12.We can conclude from the passage that .      

A.while pushing asteroids off course nuclear weapons would destroy the world

B.asteroids racing across the night sky are likely to hit Earth in the near future

C.the worry about asteroids can be left to future generations since it is unlike to happen in our    lifetime.

D.workable solutions still have to be found to prevent a collision of asteroids with Earth

A punctual person is in the habit of doing a thing at the proper time and is never late in keeping an appointment.

The unpunctual man, on one hand, never does what he has to do at the proper 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 regained. Time is more valuable than material things. In fact, time is life itself. The unpunctual man is for ever wasting and mismanaging his most valuable asset (财产) as well as other’s. The unpunctual person is always complaining that he finds no time to answer letters, or return calls or keep appointments promptly. But the man who really has a great deal to do is very careful of his time and seldom complains of want of it. He knows that he can not get through his huge amount of work unless he faithfully keeps every piece of work when it has to be attended to.

Failure to be punctual in keeping one’s appointments is the sign of disrespect towards others. If a person is invited to dinner and arrives later than the appointed time, he keeps all the other guests waiting for him. Usually this will be regarded as a great disrespect to the host and all other guests present.

Unpunctuality, moreover, is very harmful when it comes to do one’s duty, whether public or private. Imagine how it would be if those who are put in charge of important tasks failed to be at their proper place at the appointed time. A man who is known to be habitually unpunctual is never trusted by his friends or fellow men.

What does the author think is the main difference between a punctual person and an unpunctual person?

A. A punctual person does everything ahead of time while an unpunctual person does everything behind schedule.

B. A punctual person does everything at the right time while an unpunctual person seldom does anything at the correct time.

C. A punctual person has a lot of appointments while an unpunctual person has few appointments.

D. A punctual person has much time to do everything while an unpunctual person has little time to do anything.

According to the passage, the main reason that a person is always unpunctual is that _______.

A. he has more work to do than other people

B. he is always in a hurry when he works

C. he doesn’t care much about time

D. he always mismanages and wastes his time

According to the third paragraph, when you are invited to dinner, you should arrive there _______.

A. after other guests have arrived

B. before all other guests

C. at the appointed time

D. after the host has got things ready

Which of the following statements best describes the harm of unpunctuality?

A. If you are an unpunctual person, you cannot be in charge of any important task.

B. If your friends know that you are unpunctual, they may not see you again.

C. Unpunctuality may bring about heavy losses for both public and private affairs.

D. Unpunctuality may make you miss a lot of appointments and lose friends.

A punctual person is in the habit of doing a thing at the proper time and is never late in keeping an appointment.

The unpunctual man, on one hand, never does what he has to do at the proper 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 regained. Time is more valuable than material things. In fact, time is life itself. The unpunctual man is for ever wasting and mismanaging his most valuable asset (财产) as well as other’s. The unpunctual person is always complaining that he finds no time to answer letters, or return calls or keep appointments promptly. But the man who really has a great deal to do is very careful of his time and seldom complains of want of it. He knows that he can not get through his huge amount of work unless he faithfully keeps every piece of work when it has to be attended to.

Failure to be punctual in keeping one’s appointments is the sign of disrespect towards others. If a person is invited to dinner and arrives later than the appointed time, he keeps all the other guests waiting for him. Usually this will be regarded as a great disrespect to the host and all other guests present.

Unpunctuality, moreover, is very harmful when it comes to do one’s duty, whether public or private. Imagine how it would be if those who are put in charge of important tasks failed to be at their proper place at the appointed time. A man who is known to be habitually unpunctual is never trusted by his friends or fellow men.

1. What does the author think is the main difference between a punctual person and an unpunctual person?

A. A punctual person does everything ahead of time while an unpunctual person does everything behind schedule.

B. A punctual person does everything at the right time while an unpunctual person seldom does anything at the correct time.

C. A punctual person has a lot of appointments while an unpunctual person has few appointments.

D. A punctual person has much time to do everything while an unpunctual person has little time to do anything.

2. According to the passage, the main reason that a person is always unpunctual is that _______.

A. he has more work to do than other people

B. he is always in a hurry when he works

C. he doesn’t care much about time

D. he always mismanages and wastes his time

3. According to the third paragraph, when you are invited to dinner, you should arrive there _______.

A. after other guests have arrived

B. before all other guests

C. at the appointed time

D. after the host has got things ready

4. Which of the following statements best describes the harm of unpunctuality?

A. If you are an unpunctual person, you cannot be in charge of any important task.

B. If your friends know that you are unpunctual, they may not see you again.

C. Unpunctuality may bring about heavy losses for both public and private affairs.

D. Unpunctuality may make you miss a lot of appointments and lose friends.

A painter hangs his or her finished pictures on a wall, and everyone can see it. A composer writes a work, but no one can hear it until it is performed. Professional singers and players have great responsibilities, for the composer is utterly dependent on them.

 A student of music needs as long and arduous a training to become a performer as a medical student needs to become a doctor. Most training is concerned with technique, for musicians have to have the muscular proficiency of an athlete or a ballet dancer. Singers practice breathing every day, as their vocal chords would be inadequate without controlled muscular support. String players practice moving the fingers of the left hand up and down, while drawing the bow to and fro with the right arm----????????two entirely different movements. Singers and instruments have to be able to get every note perfectly in tune. Pianists are spared this particular anxiety, for the notes are already there, waiting for them, and it is the piano tuner's responsibility to tune the instrument for them. But they have their own difficulties; the hammers that hit the string have to be coaxed not to sound like percussion, and each overlapping tone has to sound clear. This problem of getting clear texture is one that confronts（使面对）student conductors: they have to learn to know every note of the music and how it should sound, and they have to aim at controlling these sounds with fanatical but selfless authority. Technique is of no use unless it is combined with musical knowledge and understanding. Great artists are those who are so thoroughly at home in the language of music that they can enjoy performing works written in any century.

19. In writing this passage, the purpose of the author is ___________.

   A. to tell us we use different sense at paints and music

   B. to recommend music needs more technique

   C. to inform us that to become a musician needs long and arduous training

   D. for the students who are to go in for music

20. If you are a string performer, you have to _____________.

   A. use your left hand to draw the bow and the right to move up and down

   B. have your both hands perform the same movements.

   C. own technique, musical knowledge and understanding

   D. practice more and more without any training

21. The problem of getting clear texture is that ____________.

  A. confronts student conductors

  B. the student conductors have to know every note and how it should sound and how to control the sounds fanatically.

 C. the sounds are too easy to control

 D. the composer’s work cannot be seen on the wall.

22. According to the passage, _______________.

 A. a composer cannot perform the music at all.

 B a composer has to utterly depend on student conductors

 C. student conductors need more training and knowledge on music to be great artists.

 D. Great artists are thoroughly at home in the language of music.

D

In the 1960s, people asked about your astrological sign(星相). In the 1990s, they wanted to know your website (网址). These days, having a web address is almost as important as a street address. Your website is an electronic meeting place for your family, friends and potentially, millions of people around the world. Best of all, you may not have to spend a cent. The Web is filled with all kinds of free services and all it takes is some time and creativity.

Think of your home page as the starting point of your website. Like the table of contents of a book or a magazine, the home page is the front door. Your site can have one or more pages, depending on how you design it.

While web pages vary greatly in their design and content, most use a traditional magazine layout (版面设计). At the top of the page is a banner(大标题) GRAPHIC. Next comes a greeting and a short description of the site. Pictures, texts, and links to other websites follow.

Before you start building your site, do some planning. Think about whom the site is for and what you want to say. Next, gather up the material that you want to put on the site. Draw a rough layout on a sheet of paper.

While there are no rules you have to follow, there are a few things to keep in mind:

Start simply If you are too ambitious (雄心勃勃的) at the beginning, you may never get the site off the ground. You can always add to your site.

Less is better Most people don't like to read a lot of text online. Break it into small pieces.

Smaller is better Most people connect to the Internet with a modem (调制解调器). Since it can take a long time to download large image files, keep the file sizes small.

Have the rights Don't put any material on your site unless you are sure you can do it legally (合法地). Learn the Net's Copyright Article for more about this.

Now it's time to roll up your sleeves and start building. Learning the Net Communities provides tools to help you build your site.

68. The main purpose of the passage is to tell you _____.

A. what a website is like

B. how to build your own website

C. how to meet people online

D. what a website is made up of

69. According to the writer, your website is a place _____.

A. where you can meet people all around the world

B. where you can buy what you want

C. where you can get free services

D. where you can meet people on the Internet

70. The purpose of the home page of your website is _____.

A. to give a list of all the contents of your website

B. to make it look like a front door

C. to direct people to more of your pages

D. to design the cover of a book or magazine

71. The writer thinks that if you are too ambitious at the beginning, _____.

A. your website may leave no space for adding new things

B. you may never have your wetside working

C. you may have no idea how to build your website

D. you may tire yourself out