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 newly trained teacher named Mary went to teach at a Navajo Indian reservation. Every day, she would ask five of the young Navajo students to __1__ the chalkboard and complete a simple math problem from   2   homework.

    They would stand there, silently,  3   to complete the task. Mary couldn’t figure it out.   4   she had studied in her educational curriculum helped, and she   5   hadn’t seen anything like it in her student-teaching days back in Phoenix.

     What am I doing wrong? Could I have chosen five students who can’t do the  6  ? Mary would wonder. No,  7  couldn’t be that. Finally she   8   the students what was wrong. And in their answers, she learned a   9   lesson from her young   10   pupils about self-image and a(n)   11   of self-worth.

     It seemed that the students  12  each other’s individuality and knew that  13  of them were capable of doing the problems.   14  at their early age, they understood the senselessness of the win-lose approach in the classroom. They believed no one would  15  if any students were shown up or embarrassed at the  16  . So they   17   to compete with each other in public.

     Once she understood, Mary changed the system   18   she could check each child’s math problem individually, but not at any child’s expense  19  his classmates. They all wanted to learn,  20  not at someone else’s expense.

1．  A．go to B．come to    C．get close to      D．bring

2．  A．his    B．their  C．his own    D．her

3．  A．happy       B．willingly   C．readily      D．unwilling

4．  A．Anything  B．Nothing    C．Everything       D．Neither

5．  A．almost      B．certainly   C．hardly      D．never

6．  A．question   B．chalkboard       C．problem    D．homework

7．  A．they  B．it      C．everything       D．each

8．  A．asked       B．questioned       C．told   D．understood

9．  A．outstanding      B．surprising C．annoying  D．frightening

10．A．sunburned B．tender       C．Indian      D．naughty

11．A．sense B．image       C．way   D．aspect

12．A．had   B．ignored     C．respected  D．cared

13．A．none        B．no one      C．each  D．not all

14．A．Especially B．Even though    C．Even so    D．Even

15．A．lose   B．win   C．achieve     D．answer

16．A．time  B．situation   C．chalkboard       D．condition

17．A．refused     B．rejected    C．tried  D．promised

18．A．if      B．so that      C．unless       D．in case

19．A．in favour of    B．of     C．by means of     D．in front of

20．A．and   B．but    C．so     D．or

A newly trained teacher named Mary went to teach at a Navajo Indian reservation. Every day, she would ask five of the young Navajo students to __1__ the chalkboard and complete a simple math problem from   2   homework.

They would stand there, silently,  3   to complete the task. Mary couldn’t figure it out.   4   she had studied in her educational curriculum helped, and she   5   hadn’t seen anything like it in her student-teaching days back in Phoenix.

What am I doing wrong? Could I have chosen five students who can’t do the  6  ? Mary would wonder. No,  7  couldn’t be that. Finally she   8   the students what was wrong. And in their answers, she learned a   9   lesson from her young   10   pupils about self-image and a(n)   11   of self-worth.

It seemed that the students  12  each other’s individuality and knew that  13  of them were capable of doing the problems.   14  at their early age, they understood the senselessness of the win-lose approach in the classroom. They believed no one would  15  if any students were shown up or embarrassed at the  16  . So they   17   to compete with each other in public.

Once she understood, Mary changed the system   18   she could check each child’s math problem individually, but not at any child’s expense  19  his classmates. They all wanted to learn,  20  not at someone else’s expense.

1．  A．go to        B．come to         C．get close to    D．bring

2．  A．his           B．their           C．his own         D．her

3．  A．happy          B．willingly         C．readily        D．unwilling

4．  A．Anything      B．Nothing         C．Everything     D．Neither

5．  A．almost         B．certainly        C．hardly           D．never

6．  A．question       B．chalkboard     C．problem         D．homework

7．  A．they         B．it             C．everything     D．each

8．  A．asked              B．questioned     C．told            D．understood

9．  A．outstanding  B．surprising       C．annoying       D．frightening

10．A．sunburned    B．tender         C．Indian        D．naughty

11．A．sense        B．image         C．way           D．aspect

12．A．had          B．ignored          C．respected       D．cared

13．A．none           B．no one        C．each           D．not all

14．A．Especially    B．Even though       C．Even so       D．Even

15．A．lose          B．win            C．achieve          D．answer

16．A．time         B．situation         C．chalkboard     D．condition

17．A．refused        B．rejected         C．tried           D．promised

18．A．if             B．so that        C．unless        D．in case

19．A．in favour of  B．of            C．by means of   D．in front of

20．A．and          B．but             C．so              D．or

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.

(D)
Our 16-year-old daughter started to smoke last Christmas. It killed me to see that lovely girl with a cigarette(香烟) in her mouth. I told her how I felt. Martha continued to smoke, saying, “It's my life,” and so on. I told her if she didn't stop smoking, I wouldn't send her to college. She agreed to give it up.
Last night there was cigarette smell on Martha's breath. She had to say she had broken her word. Now I must do what I've said to punish(惩罚) her.
Martha is unusually bright and wants to teach children. I'm working full-time to put her older sister through school and would do the same for Martha. My husband's pay is good, but with prices going up all the time we could never educate the girls unless I kept on working.
My theory(理论) is that if smoking is more important to Martha than college, I'm a fool to work to put her through college.
68.Why did the mother feel sad?
A. Because her daughter failed to go to college.
B. Because her daughter tried to kill her.
C. Because her daughter promised to smoke no more.
D. Because her daughter got used to smoking.
69.The mother warned that if Martha didn't give up smoking, she would ______.
A. refuse to give Martha any money
B. not be Martha's mother
C. refuse to pay for Martha's college education
D. not let Martha teach children
70.What did Martha really do after mother warned her?
A. She failed to keep her promise.
B. She kept her promise.
C. She managed to give up smoking.
D. She broke something her mother give her.
71.The mother said that ______.
A. Martha was usually a stupid girl
B. though Martha's father received high pay, it was not enough for their two girls' college education
C. as everything was becoming more and more expensive, the two girls had to work hard to pay for their education
D. she liked Martha's sister but hated Martha
72. The mother thought that ______.
A. she was a foolish woman working hard
B. it was right for her to pull Martha out of college
C. smoking was too bad a habit(习惯) for a young girl
D. Martha would rather lose her life than stop smoking