In 1961, scientist set up gigantic, sensitive instruments to collect radio waves from the far reaches of space, hoping to discover in them some mathematical pattern indicating that the waves were sent out by other intelligent beings. The first attempt failed, but someday the experiment may succeed.
　　What reason is there to think that we may actually detect intelligent life in outer space？To begin with, modern theories of the development of stars suggest that almost every star has some sort of family of planets. So any star like our own sun （and there are billions of such stars in the universe） is likely to have a planet situated at such a distance that it would receive about the same amount of radiation as the earth.
　　Furthermore, such a planet would probably have the same general composition as our planet; so, allowing a billion years or two or three, there would be a very good chance for life to develop, if current theories of the origin of life are correct.
　　But intelligent life？Life that has reached the stage of being able to send radio waves out into space in a deliberate pattern？Our own planet may have been in existence for five billion years and may have had life on it for two billion, but it is only in the last fifty years that intelligent life capable of sending radio waves into space has lived on earth. From this it might seem that even if there were no technical problems involved, the chance of receiving signals from any particular earth-type planet would be extremely small.
　　This does not mean that intelligent life at our level does not exist somewhere. There are such an unimaginable number of stars that, even at such miserable possibility, it seems certain that there are millions of intelligent life forms scattered through space. The only trouble is, none may be within easy distance of us. Perhaps none ever will be; perhaps the distances that separate us from our fellow “creatures” of this universe will forever remain too great to be conquered. And yet it is conceivable that someday we may come across one of them or, frighteningly, one of them may come across us. What would they be like, these outside-the-earth creatures？
1.What point is the author making by stating that almost every star has some sort of family of planets？
　　A. Sooner or later intelligent beings will be found on one of the stars.
　　B. There must be one or two of the planets on which there are no intelligent beings.
　　C. There are sufficient planets for there to be one that enjoys the same conditions as the earth does.
　　D. One or two billion years later intelligent beings will generate on those planets.
2.What is the main topic of the passage？
　　A. Some probable intelligent life forms on other planets.
　　B. Various stages undergone by the intelligent life on other planets.
　　C. Grounds for probable existence of intelligent life on other planets.
　　D. The possibility of intelligent life existing on our planet.
3.Which of the following can be inferred from the passage？
A. An encounter is probable between people from the earth and intelligent beings from another planet.
B. Though the first attempt failed, scientists did discover the radio waves sent out by other intelligent beings.
C. Other intelligent beings were able to send our radio waves into space well before the last fifty years.
D. It is certain that there are millions of intelligent beings scattered in space but only too far away.
4.According to the author, what is the difference between “we may come across one of them” and “one of them may come across us”？
A. The earth would be dangerously disadvantaged if it is sought after by possibly much more developed creatures.
B. It would prove that there are too many outside-the-earth creatures if “one of them comes across us”.
C. The history of the development of the earth would be proved to be shorter than that of “them” if “they” come across us.
D. it would prove that the distance in between is not so great as we think if “we come across one of them” someday.

　　In 1961, scientist set up gigantic, sensitive instruments to collect radio waves from the far reaches of space, hoping to discover in them some mathematical pattern indicating that the waves were sent out by other intelligent beings. The first attempt failed, but someday the experiment may succeed.

　　What reason is there to think that we may actually detect intelligent life in outer space？To begin with, modern theories of the development of stars suggest that almost every star has some sort of family of planets. So any star like our own sun （and there are billions of such stars in the universe） is likely to have a planet situated at such a distance that it would receive about the same amount of radiation as the earth.

　　Furthermore, such a planet would probably have the same general composition as our planet; so, allowing a billion years or two or three, there would be a very good chance for life to develop, if current theories of the origin of life are correct.

　　But intelligent life？Life that has reached the stage of being able to send radio waves out into space in a deliberate pattern？Our own planet may have been in existence for five billion years and may have had life on it for two billion, but it is only in the last fifty years that intelligent life capable of sending radio waves into space has lived on earth. From this it might seem that even if there were no technical problems involved, the chance of receiving signals from any particular earth-type planet would be extremely small.

　　This does not mean that intelligent life at our level does not exist somewhere. There are such an unimaginable number of stars that, even at such miserable possibility, it seems certain that there are millions of intelligent life forms scattered through space. The only trouble is, none may be within easy distance of us. Perhaps none ever will be; perhaps the distances that separate us from our fellow “creatures” of this universe will forever remain too great to be conquered. And yet it is conceivable that someday we may come across one of them or, frighteningly, one of them may come across us. What would they be like, these outside-the-earth creatures？

1.What point is the author making by stating that almost every star has some sort of family of planets？

　　A. Sooner or later intelligent beings will be found on one of the stars.

　　B. There must be one or two of the planets on which there are no intelligent beings.

　　C. There are sufficient planets for there to be one that enjoys the same conditions as the earth does.

　　D. One or two billion years later intelligent beings will generate on those planets.

2.What is the main topic of the passage？

　　A. Some probable intelligent life forms on other planets.

　　B. Various stages undergone by the intelligent life on other planets.

　　C. Grounds for probable existence of intelligent life on other planets.

　　D. The possibility of intelligent life existing on our planet.

3.Which of the following can be inferred from the passage？

A. An encounter is probable between people from the earth and intelligent beings from another planet.

B. Though the first attempt failed, scientists did discover the radio waves sent out by other intelligent beings.

C. Other intelligent beings were able to send our radio waves into space well before the last fifty years.

D. It is certain that there are millions of intelligent beings scattered in space but only too far away.

4.According to the author, what is the difference between “we may come across one of them” and “one of them may come across us”？

A. The earth would be dangerously disadvantaged if it is sought after by possibly much more developed creatures.

B. It would prove that there are too many outside-the-earth creatures if “one of them comes across us”.

C. The history of the development of the earth would be proved to be shorter than that of “them” if “they” come across us.

D. it would prove that the distance in between is not so great as we think if “we come across one of them” someday.

There seems never to have been a civilization without toys, but when and how they developed is unknown． They probably came about just to give children something to do．

　　In the ancient world, as is today, most boys played with some kinds of toys and most girls with another． In societies where social roles are rigidly determined, boys pattern their play after the activities of their fathers and girls after the tasks of their mothers． This is true because boys and girls are being prepared, even in play, to step into the roles and responsibilities of the adult world．

　　What is remarkable about the history of toys is not so much how they changed over the centuries but how much they have remained the same． The changes have been mostly in terms of craftsmanship, mechanics, and technology． It is the universality of toys with regard to their development in all parts of the world and their persistence to the present that is amazing． In Egypt, the Americas, China, Japan and among the Arctic （北极的） peoples, generally the same kinds of toys appeared． Variations depended on local customs and ways of life because toys imitate their surroundings． Nearly every civilization had dolls, little weapons, toy soldiers, tiny animals and vehicles．

Because toys can be generally regarded as a kind of art form, they have not been subject to technological leaps that characterize inventions for adult use． The progress from the wheel to the oxcart to the automobile is a direct line of ascent （进步）． The progress from a rattle used by a baby in 3,000 BC to one used by an infant today, however, is not characterized by inventiveness． Each rattle is the product of the artistic tastes of the times and subject to the limitations of available materials．

1.Which is a major factor leading to the different variations of toys?

         A． Scientific advances and technological progress

         B． Different local customs and lifestyles of different peoples

         C． Craftsmanship, mechanics, and technology

         D． The artistic tastes of the times and the limitations of available materials

2.Why do boys and girls play with different kinds of toys?

         A． Because they are intended for different social roles and responsibilities．

         B． Because boys like to invent and girls imitate．

         C． Because boys play with their fathers while girls their mothers．

         D． Because they will take up different jobs when they grow up．

3.One amazing aspect about the “universality of toys” is______．

         A． They appeared all over the world almost at the same time in history．

         B． They have not changed except in craftsmanship, mechanics, and technology．

         C． Having existed for thousands of years, toys are still found all over the world today．

         D． They are a kind of art form, which has been promoted by inventiveness．

There seems never to have been a civilization without toys, but when and how they developed is unknown． They probably came about just to give children something to do．
　　In the ancient world, as is today, most boys played with some kinds of toys and most girls with another． In societies where social roles are rigidly determined, boys pattern their play after the activities of their fathers and girls after the tasks of their mothers． This is true because boys and girls are being prepared, even in play, to step into the roles and responsibilities of the adult world．
　　What is remarkable about the history of toys is not so much how they changed over the centuries but how much they have remained the same． The changes have been mostly in terms of craftsmanship, mechanics, and technology． It is the universality of toys with regard to their development in all parts of the world and their persistence to the present that is amazing．In Egypt, the Americas, China, Japan and among the Arctic （北极的） peoples, generally the same kinds of toys appeared． Variations depended on local customs and ways of life because toys imitate their surroundings． Nearly every civilization had dolls, little weapons, toy soldiers, tiny animals and vehicles．
Because toys can be generally regarded as a kind of art form, they have not been subject to technological leaps that characterize inventions for adult use． The progress from the wheel to the oxcart to the automobile is a direct line of ascent （进步）． The progress from a rattle used by a baby in 3,000 BC to one used by an infant today, however, is not characterized by inventiveness． Each rattle is the product of the artistic tastes of the times and subject to the limitations of available materials．
【小题1】Which is a major factor leading to the different variations of toys?

　　In 1961, scientist set up gigantic, sensitive instruments to collect radio waves from the far reaches of space, hoping to discover in them some mathematical pattern indicating that the waves were sent out by other intelligent beings. The first attempt failed, but someday the experiment may succeed.

　　What reason is there to think that we may actually detect intelligent life in outer space？To begin with, modern theories of the development of stars suggest that almost every star has some sort of family of planets. So any star like our own sun （and there are billions of such stars in the universe） is likely to have a planet situated at such a distance that it would receive about the same amount of radiation as the earth.

　　Furthermore, such a planet would probably have the same general composition as our planet; so, allowing a billion years or two or three, there would be a very good chance for life to develop, if current theories of the origin of life are correct.

　　But intelligent life？Life that has reached the stage of being able to send radio waves out into space in a deliberate pattern？Our own planet may have been in existence for five billion years and may have had life on it for two billion, but it is only in the last fifty years that intelligent life capable of sending radio waves into space has lived on earth. From this it might seem that even if there were no technical problems involved, the chance of receiving signals from any particular earth-type planet would be extremely small.

　　This does not mean that intelligent life at our level does not exist somewhere. There are such an unimaginable number of stars that, even at such miserable possibility, it seems certain that there are millions of intelligent life forms scattered through space. The only trouble is, none may be within easy distance of us. Perhaps none ever will be; perhaps the distances that separate us from our fellow “creatures” of this universe will forever remain too great to be conquered. And yet it is conceivable that someday we may come across one of them or, frighteningly, one of them may come across us. What would they be like, these outside-the-earth creatures？

1.What point is the author making by stating that almost every star has some sort of family of planets？

　　A. Sooner or later intelligent beings will be found on one of the stars.

　　B. There must be one or two of the planets on which there are no intelligent beings.

　　C. There are sufficient planets for there to be one that enjoys the same conditions as the earth does.

　　D. One or two billion years later intelligent beings will generate on those planets.

2.What is the main topic of the passage？

　　A. Some probable intelligent life forms on other planets.

　　B. Various stages undergone by the intelligent life on other planets.

　　C. Grounds for probable existence of intelligent life on other planets.

　　D. The possibility of intelligent life existing on our planet.

3.Which of the following can be inferred from the passage？

A. An encounter is probable between people from the earth and intelligent beings from another planet.

B. Though the first attempt failed, scientists did discover the radio waves sent out by other intelligent beings.

C. Other intelligent beings were able to send our radio waves into space well before the last fifty years.

D. It is certain that there are millions of intelligent beings scattered in space but only too far away.

4.According to the author, what is the difference between “we may come across one of them” and “one of them may come across us”？

A. The earth would be dangerously disadvantaged if it is sought after by possibly much more developed creatures.

B. It would prove that there are too many outside-the-earth creatures if “one of them comes across us”.

C. The history of the development of the earth would be proved to be shorter than that of “them” if “they” come across us.

D. it would prove that the distance in between is not so great as we think if “we come across one of them” someday.