题目列表(包括答案和解析)
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
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 weapo
ns. But the cost wouldn't be cheap. I
s 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 th an meteoroids. |
| D．Asteroids are more mysterious than meteoroids. |
| 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. |
| 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. |
| 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. |
| A．Optimistic. | B．Critical. | C．Objective. | D．Subjective. |
A student went to college after 41__ all his school examinations. There he put his name down for world geography. 42_ after the first day, he did not go to 43_ any more. The teacher noticed that this student was 44_ absent and thought that he had changed to 45 class. He was very 46_ when he saw the boy's name on the list(名单) of students 47_ wanted to take the geography examination 48_ the end of the year.
The teacher had prepared a difficult examination paper, which covered 49 he had taught, and he was eager to see 50 this student answered the questions. He expected that his answers would be very 51_; but when he examined his paper carefully, he found only one small mistake in them. 52_ this surprised him very much, he went through the paper 53_, but was still not able to find 54 one mistake, so he sent 55 the student to question him about his work after the exam..
When the student had 56 the room, the teacher said to him, “I know that you came to my class only once on the first day and that you have been absent from all the others. Yet I have found only one small mistake in your paper. 57_ is that?”
“Oh, I'm sorry about that mistake, sir, ”answered the student. “After the examination, I realized 58 I ought to have written. I would not have made that mistake 59 I had been confused(弄糊涂) by your 60_ lecture.”
1. A．having B．taking C．passing D．failing
2. A．So B．But C．However D．And
3. A．it B．lesson C．college D．class
4. A．always B．once C．never D．sometimes
5. A．another B．the other C．other D．others
6. A．angry B．happy C．sorry D．surprised
7. A．that he B．he C．who D．whom
8. A．by B．at C．after D．in
9. A．everything B．something C．anything D．nothing
10. A．what B．when C．how D．why
11. A．good B．full C．nice D．bad
12. A．For B．As C．So D．Though
13. A．two times B．twice C．once D．again once
14. A．more than B．another C．the other D．second
15. A．with B．to C．x D．for
16. A．reached to B．arrived to C．arrived into D．come into
17. A．Why B．What C．How D．Which
18. A．where B．why C．what D．when
19. A．unless B．if C．because D．as
20. A．first B．last C．latest D．certain
A student went to college(大学) after_41_ all his school examinations. There he put his name down for world geography. _42_after taking the first lecture on the first day, he did not go to class any_43_. The teacher noticed that this student was _44_ absent (缺课) and thought that he had changed to_45__class. He was very_46_when he saw the boy's name on the list(名单) of students __47_ wanted to take the geography examination _48_ the end of the year.
The teacher had prepared a difficult examination paper, which covered__49__he had taught, and he was eager(急切) to see_50__this student answered the questions. He expected that his answer would be very_51__. But when he examined his paper carefully, he found only one small mistake in it.__52__ this surprised him very much, he went through the paper__53__, but was still not able to find__54___one mistake, so he sent__55___the student to ask him about his work..
When the student had__56___the room, the teacher said to him, “I know that you came to my class only once on the first day and that you have been absent from all the others. Yet I have found only one small mistake in your paper.__57___ is that?”
“Oh, I'm sorry about that mistake, sir, ”answered the student. “After the examination, I realized __58___I ought to have written. I would not have made that mistake___59___I had not been confused(弄糊涂) by your ___60___lecture.”
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A student went to college(大学) after 36__ all his school examinations. There he put his name down for world geography, 37_ after the first day, he did not go to 38_ any more. The teacher noticed that this student was 39_ absent (缺课) and thought that he had changed to 40 class. He was very 41_ when he saw the boy's name on the list(名单) of students 42_ wanted to take the geography examination 43_ the end of the year.
The teacher had prepared a difficult examination paper, which covered 44 he had taught, and he was eager(急切) to see 45 this student answered the questions. He expected that his answer would be very 46_; but when he examined his paper carefully, he found only one small mistake in them.47_ this surprised him very much, he went through the paper 48_, but was still not able to find 49 one mistake, so he sent 50 the student to question him about his work..
When the student had 51 the room, the teacher said to him, “I know that you came to my class only once on the first day and that you have been absent from all the others. Yet I have found only one small mistake in your paper. 52_ is that?”
“Oh, I'm sorry about that mistake, sir,”answered the student. “After the examination, I realized 53 I ought to have written. I would not have made that mistake 54 I had not been confused(弄糊涂) by your 55_ lecture.”
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