For more than twenty years scientists have been searching for signs of life on other planets. Most of these searches have been done over the radio. The hope is that someone in outer space may be trying to get in touch with us. Scientists also have sent radio and television messages on spaceships traveling through space, on the chance that someone may be receptive to such messages.

Scientists are using powerful radio telescopes to listen to signals from about 1,000 stars, all within 100 light years of earth. In addition, they will scan the entire sky to “listen” for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight channels at one time. Scientists are looking for any signal that stands out from the background noise.

Of the 200 billion stars in the Milky Way galaxy (银河星系), scientists find that 5% are like our sun. Perhaps half of them have a planet like earth. Such a planet would be a reasonable distance from the star for temperatures to be right for the evolution (进化) of life. Based on the inhabitable (that can be lived in) planets in our galaxy, most scientists agree that chances are likely that one or more of these planets support some life.

However, many scientists wonder whether intelligent (智能的) life exists on other planets. Some believe that twenty years of searching without any intelligible messages shows that no one is out there. They say that the evolution of intelligence comparable to ours is unlikely.

Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy. Although our sun family is only about five billion years old, our galaxy is about 20 billion years old. In that time, some scientists think it is likely that civilization much more advanced than ours have developed. Perhaps these civilizations send us no signals; perhaps we have not recognized the signals they have sent us. If we hope to find intelligent life, these scientists believe that we have to keep looking.

According to the passage, how many planets in our galaxy might be inhabitable?

A. 5 billion．　　 B. 10 billion.　　         C. 15 billion.　　         D. 200 billion

The first paragraph in this passage is mainly about ________ .

A. how scientists are looking for signs of life on other planets

B. why scientists are looking for signs of life on other planets

C. where scientists are looking for signs of life on other planets

D. when scientists are looking for signs of life on other planets

Which of these statements is True based on the information in the passage?

A. The earth is one of the oldest planets in our galaxy.

B. Most scientists believe that there is intelligent life on other planets.

C. Scientists don’t believe that there might be life on other planets.

D. Scientists are trying different ways to find signs of life on other planets.

　For more than twenty years scientists have been searching for signs of life on other planets. Most of these searches have been done over the radio. The hope is that someone in outer space may be trying to get in touch with us. Scientists also have sent radio and television messages on spaceships traveling through space, on the chance that someone may be receptive to such messages.

　　Scientists are using powerful radio telescopes to listen to signals from about 1, 000 stars, all within 100 light years of earth. In addition, they will scan（扫视）the entire sky to “listen” for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight channels at one time. Scientists are looking for any signal they stands out from the background noise.

　　Of the 200 billion stars in the Milky Way galaxy（银河星系）, scientists find that five percent are like our sun. Perhaps half of them have a planet like earth. Such a planet would be a reasonable distance from the star for temperatures to be right for the evolution（进化）of life. Based on the inhabitable（that can be lived in）planets in our galaxy, most scientists agree that chances are likely that one or more of these planets support some life.

　　However, many scientists wonder whether intelligent（有智力的）life exists on other planets. Some believe that twenty years of searching without any intelligible messages shows that no one is out there. They say that the evolution of intelligence comparable to ours is unlikely.

　　Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy. Although our sun family is only about five billion years old, our galaxy is about 20 billion years old. In that time, some scientists think it is likely that civilization（文明）much more advanced than ours have developed. Perhaps these civilizations send us no signals; perhaps we have not recognized the signals they have sent us. If we hope to find intelligent life, these scientists believe that we have to keep looking.

According to the passage, how many planets in our galaxy might be inhabitable?

　　A. 5 billion．　　　　　　　　　　 B. 10 billion.

　　C. 15 billion.　　　　　　　　　　　D. 200 billion

The first paragraph in this passage is mainly about ________ .

　　A. how scientists are looking for signs of life on other planets

　　B. why scientists are looking for signs of life on other planets

　　C. where scientists are looking for signs of life on other planets

　　D. when scientists are looking for signs of life on other planets

The underlined word “monitor” in the passage means“ ________ ”.

　　A. find　　　　　　　　　　　　　B. follow

　　C. check　　　　　　　　　　　　 D. form

Which of these statements is true based on the information in the passage?

　　A. The earth is one of the oldest planets in our galaxy.

　　B. Most scientists believe that there is intelligent life on other planets.

　　C. Scientists are trying different ways to find signs of life on other planets.

D. Scientists don’t believe that there might be life on other planets.

Once I thought love meant flowers, gifts and sweet kisses. So, I really 36 whether there is love between my parents. Every day they are very busy 37 to earn money to pay the high schooling for me. They don't act in the 　38 ways that I read in books or I see on TV, and sending flowers to each other on Valentine's Day is even 　39 .

　 One day, my mother was sewing a quilt. I asked her if there was 　40 between them. She paused her work and raised her head with 41 . Then she bowed her head and 42 sewing the quilt. I was very 　43 because I thought I had hurt her. But after a few minutes she said, “Look at this thread. Sometimes it 　44 ,but most of the time it disappears in the quilt. If life is a quilt, then love should be a thread. It can 　45 be seen anywhere or anytime, but it's really there, and makes the quilt 　46 ”. I listened carefully but I couldn't understand her 　47 the next spring.

　 My mother suddenly got sick seriously and had to stay in hospital for a one-month treatment. Every morning and dusk after she 　48 from the hospital, my father 49 my mother walking slowly on the country road. There were many beautiful flowers, green grass and trees, and the sun gently glistened 50 the leaves. All of these 　51 the most beautiful picture in the world. 　52 their eyes, I know they love each other deeply. From this experience, I 　53 that love was just a 54 in the quilt of our life. Love is 　 　55　 , making life strong and warm.

36. A. believe　　　　 B. hesitate　　　　　　 C. ignore　　　 D. doubt 　　　

37. A. keeping　　　 B. willing　　　 C. trying　　　　 D. learning

38. A. magic　 　　　　　　 B. romantic　　　　　 C. formal　　　 D. special

39. A. unsuitable　　 　　　 B. impolite　　　　　　 C. uneasy　　　 　　　 D. impossible

40. A. difference　 　　　 B. love　　　　　　　　 C. similarity　　　　　 D. fight

41. A. surprise　　　　　　 B. anger　　　　　　　 C. smile　　　　　　　　 D. calm

42. A. finished　　　 B. forgot　　　 C. continued　　　　 D. considered

43. A. excited　　　　 B. worried　　　　　　 C. shocked　　　　　 D. disappointed

44. A. exists　　　　　　　　 B. works 　　　 C. appears　　　　　　 D. breaks　　　

45. A. hardly　　　　 　　　 B. easily　　　　　　　 C. simply　　　 D. usually

46. A. long-lasting B. long-dated C. long-suffering D. long-winded

47. A. after　　　　　　　　　 B. before　　　 C. until　　　　　　　　 D. since

48. A. returned　　　　　　 B. escaped　　 　　　 C. remained　　　　　 D. heard

49. A. led　　　　　　　 B. let　　　　　　　　　　 C. made　　　　 　　 D. helped

50. A. from　　　　　　　　　 B. through　　　　　　 C. across　　　 D. throughout

51. A. made with　 　　　 B. made into　　　　 C. made up　　　　　 D. made of

52. A. Reading　　　　　　 B. Watching　　　　　 C. Seeing　　　 D. Checking

53. A. expected　　　　　　 B. realized　　　 　　　 C. noticed　　　　　　 D. admitted

54. A. material　　　 B. design　　　 C. color　　　　　　　　 D. thread

55. A. everywhere B. inside　　　　 C. anywhere　　　　 D. outside