Some people argue using _______ nature to meet our own needs may spell disaster, unless we start to look around and understand how _________ clean environment benefits us all.

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.

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.

2. 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. Collisions of smaller asteroids with Earth occur more often than expected.

    D. It's still too early to say whether such a collision might occur.

3. 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 solve.

    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.

4.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 unlikely to  happen in our lifetime

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

5.Which of the following best describes the author's tone in this passage?

    A. Optimistic.          B. Critical.       C. Objective.      D. Subjective.

Everyone agrees that all the creatures want happiness and are afraid of pain and grief. The question, however, is “What is real happiness?” The desire for happiness has no meaning without understanding the real nature of happiness.
Generally, ordinary beings consider sensual（感觉的） pleasures as happiness, and their actions are directed toward gaining these. According to them, searching for happiness means searching for pleasures of the senses. The question, “What is happiness?”, does not arise（出现） in their hearts, because in their hearts they think of a life full of sensual joys as a happy life.
Some thinkers say, “Happiness does not lie in the objects of enjoyment; happiness or unhappiness lies in the imagination.” To prove their belief they give examples like the following one. A man has a two-storey house. When he thinks of those who have a house with three storeys or more, he feels unhappy. When he thinks of those who have just a cottage, he feels happy. Such happiness does not lie in possessions（占有物）, but in the imagination. They advise people to take inspiration from those who have few possessions but are quite happy. If you only consider people wealthier than yourself, you will always be unhappy.
If you want to be happy, they say, look at the poor. But it is unreasonable to hold that happiness lies in the imagination. And it is inappropriate to think that someone is happy if he only imagines himself better than the poor and the unhappy. This attitude also satisfies the sense of pride of possession. This can never be called happiness. Unless we find out where happiness lies, we cannot really become happy.
Some ask people to do this or that, and say, “This way your desires will be satisfied. That way you will get what you want and become happy.” People holding these views regard happiness as satisfaction of desires and unhappiness as denial(否定) of such satisfaction.
【小题1】What kind of life can make common people feel happy?

B

Unless we spend money to spot and prevent asteroids (小行星) 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.

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.

2. 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 unlikely to happen in our lifetime

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

3. Which of the following best describes the author's tone in this pass age?

  [ A ]. Optimistic.  [ B ]. Critical.  [ C ]. Objective.  [ D ]. Arbitrary.

Some people argue using ____________ nature to meet our own needs may spell disaster, unless we start to look around and understand how _________ clean environment benefits us all.

    A. /; a          B . the;  the         C. the; a        D. a; a