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

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

Unless we spend money to spot and prevent asteroids now，one might crash into Earth 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 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 it 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 big 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(毁灭性的) rocks than from a great nuclear fleet set against them，” said a New York Times article.
【小题1】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.

As the pace of life continues to increase, we are fast losing the art of relaxation. 21  you are in the habit of rushing through life, being on the go from morning till night, it is hard to  22   down. But relaxation is  23   for a healthy mind and body.

Stress is a  24   part of everyday life and there is no way to  25  it. In fact, it is not the bad thing that it is often supposed to be. A  26  amount of stress is important to provide motivation and give  27  to life. It is only when the stress gets out of control  28  it can lead to poor performance and  29  health.

The amount of stress a person can bear  30  very much on the individual. Some people are not afraid of stress, and such  31  are obviously chief material for managerial.(管理的) responsibilities. Other people lose heart at first  32  of unusual difficulties. When exposed to stress, in  33 form , we react both physically and mentally. In fact we make a choice between “34  and fight”. And in more ancient days the choices made the  35  between life and death. The crisis we meet today are  36  to be so extreme, but however little the stress is, it requires the same response. It is when such a reaction  37  a long time, through continued exposure to stress, that health becomes  38  . Such serious conditions as high blood pressure and heart disease have established links with stress. 39  we cannot remove stress from our lives, we need to find ways to deal with it.

So what do you think of   40  ? What is your way to deal with it?

As the pace of life continues to increase, we are fast losing the art of relaxation.   1   you are in the habit of rushing through life, being on the go from morning till night, it is hard to   2   

down. But relaxation is   3   for a healthy mind and body.

Stress is a   4   part of everyday life and there is no way to   5   it. In fact, it is not the bad thing that it is often supposed to be. A   6   amount of stress is important to provide motivation and give   7   to life. It is only when the stress gets out of   8   that it can lead to poor performance and ill health.

The amount of stress a person can bear   9   very much on the individual. Some people are not afraid of stress, and such   10   are obviously chief quality for managerial(管理的) responsibilities. Others lose heart at first   11   of unusual difficulties. When exposed to stress, in   12   form, we react both chemically and physically. In fact we make a choice between  13  and fight. And in more ancient days the choices made the   14   between life and death. The crises(危机) we meet today are   15   to be so extreme, but however little the stress, it requires the same response. It is when such a reaction   16   long, through continued exposure to stress, that health becomes   17  . Such serious conditions as high blood pressure and heart diseases have   18   links with stress.   19   we cannot remove stress from our lives we need to find ways to deal with it. It would be   20   to do so even if we could remove it.

So what do you think of stress? What is your way to deal with it?

1．A．When                   B．While                  C．Once                  D．As

2．A．slow                     B．calm                   C．get                      D．turn

3．A．unnecessary          B．harmful               C．available              D．necessary

5．A．tolerate                 B．solve                   C．avoid                  D．guard

6．A．definite                 B．certain                 C．large                   D．whole

7．A．purpose                B．protection            C．information          D．freedom

8．A．order                    B．condition             C．date                    D．control

9．A．insists                   B．depends               C．calls                    D．spends

10．A．patterns               B．expressions          C．situations             D．characters

11．A．glance                 B．view                   C．sight                   D．impression

12．A．whichever           B．whatever             C．however              D．whenever

13．A．praise                  B．fright                  C．pressure              D．anxiety

14．A．decision              B．promise               C．difference            D．sense

15．A．unlikely               B．likely                   C．incredible            D．unmistakable

16．A．takes                   B．lives                    C．stands                 D．lasts

17．A．balanced              B．injured                 C．endangered          D．interrupted

18．A．established           B．organized             C．disconnected       D．exchanged

19．A．Unless                 B．Since                  C．Even                   D．Still

20．A．sensible             B．right                    C．unbelievable       D．unwise