B
As a result of pollution, Lake Erie, on the borders of the USA and Canada, is now without any living things.
Pollution in water is not simply a matter of “poisons” killing large numbers of fish overnight, Very often the effects of pollution are not noticed for many months or years because the first organisms（生物体）to be affected are either plants or plankton(浮游生物). But these organisms are the food of fish and birds and other creatures. When this food disappears, the fish and birds die too. In this way a whole food chain can be wiped out, and it’s not until dead fish and water birds are seen at the river’s edge or on the seashore that people realize what is happening.
　　Where do the substances which pollute the water come from? There are two main sources of sewage（下水道污物）and industrial waste. As more detergent（洗涤剂）is used in the home, so more of it is finally put into our rivers, lakes and seas. Detergents harm water birds, dissolving the natural substances which keep their feathers water-proof (防水). Sewage itself, if not properly treated, makes the water dirty and prevents all forms of life in rivers and the sea from receiving the oxygen they need. Industrial waste is even more harmful as there are many highly poisonous things in it, such as copper and lead.
　　So, if we want to stop this pollution, the answer is simple: sewage and industrial waste must be made clear before flowing into the water. It may already be too late to save some rivers and lakes, but others can still be saved if the correct action is taken at once.
70. Pollution of water is noticed________.
　　A. when the first organisms are affected　     
B. when a good many fish and birds die
　　C. when poisonous things are poured into water　
D. as soon as the balance of nature is destroyed
71.The living things die because there is no ________in the lake or river.
　　A. water　　　　　            B. fish           　 C. poison　　　　　  D. oxygen
72. Which of the following is harmful according to the passage?
　　A. Organisms              　B. Plants and plankton in the water
　　C. Waste water from cleaning    D. Industrial waste made clear before flowing into the water
73. The way to stop water pollution is to________.
　　A. realize the serious situation clearly
　　B. put oxygen into the river
　　C. make the waste material harmless before flowing into the water
　　D. make special room in the sea for our rubbish

When I was growing up, I had an old neighbor named Dr. Gibbs. He didn’t look like any doctor I’d ever known. He never yelled at us for playing in his yard. I remember him as someone who was a lot nicer than most of the adults in our community.

When Dr. Gibbs wasn’t saving lives, he was planting trees. His house sat on ten acres, and his life’s goal was to make it a forest.

The good doctor had some interesting theories concerning plant care and growth. He never watered his new trees, which flew in the face of conventional wisdom. Once I asked why. He said that watering plants spoiled them so that each successive tree generation would grow weaker and weaker. So you have to make things rough for them and weed out(淘汰) the weaker trees early on. He talked about how watering trees made for shallow roots, and how trees that weren’t watered had to grow deep roots in search of moisture. I took him to mean that deep roots were to be treasured.

So he never watered his trees. He planted an oak and, instead of watering it every morning, he beat it with a rolled-up newspaper. Smack! Slap! Pow! I asked him why he did that, and he said it was to get the tree’s attention.

Dr. Gibbs passed away a couple of years after I left home. Every now and again, I walked by his house and looked at the trees that I’d watched him plant some twenty-five years ago. They’re extremely tall, big and robust since they have deep roots now. However, the trees in my garden trembled in a cold wind although I had watered them for several years.

It seems that adversity(逆境) and suffering benefit these trees in ways comfort and ease never could. I stood there deep in thought.

Every night before I go to bed, I check on my two sons. I stand over them and watch their little bodies, the rising and falling of life within. I often pray for them. Mostly I pray that their lives will be easy. But I think that it’s time to change my prayer(祷词) because now I know my children are going to encounter hardship.

According to Dr. Gibbs’ theories, trees will become weaker if they _________.

A. are lack of care　　　　　B. are watered      C. are weeded out　　　　　D. are beaten

According to Para.3 and Para.4, we can infer that Dr. Gibbs’ motto(座右铭) may be       .

A. “Seeing is believing”                                    B. “Put everything in proper use”

C. “Practice makes perfect”                               D. “No pain, no gain”

The underlined word robust in Para.5 most probably means _________.

A. strong　　                      B. strange　　       C. deep　　                        D. old

Which of the following may be the author’s best prayer for his two sons now?

A. I wish them strong wings, with which they can fly higher and touch the sky.

B. I wish them nice fortune so that they can meet people like Dr. Gibbs in the future.

C. I wish them deep roots into the earth since the rains fall and the winds blow often.

D. I wish them great shades under the tree since the sunlight is always sharp and bitter.

Which of the following can be the best title of this passage?

A Nice Doctor  B. The Deep Roots  C. Adversity and Suffering  D. My Childhood Memory

　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.

When I was growing up, I had an old neighbor named Dr. Gibbs. He didn’t look like any doctor I’d ever known. He never yelled at us for playing in his yard. I remember him as someone who was a lot nicer than most of the adults in our community.

When Dr. Gibbs wasn’t saving lives, he was planting trees. His house sat on ten acres, and his life’s goal was to make it a forest.

The good doctor had some interesting theories concerning plant care and growth. He never watered his new trees, which flew in the face of conventional wisdom. Once I asked why. He said that watering plants spoiled them so that each successive tree generation would grow weaker and weaker. So you have to make things rough for them and weed out(淘汰) the weaker trees early on. He talked about how watering trees made for shallow roots, and how trees that weren’t watered had to grow deep roots in search of moisture. I took him to mean that deep roots were to be treasured.

So he never watered his trees. He planted an oak and, instead of watering it every morning, he beat it with a rolled-up newspaper. Smack! Slap! Pow! I asked him why he did that, and he said it was to get the tree’s attention.

Dr. Gibbs passed away a couple of years after I left home. Every now and again, I walked by his house and looked at the trees that I’d watched him plant some twenty-five years ago. They’re extremely tall, big and robust since they have deep roots now. However, the trees in my garden trembled in a cold wind although I had watered them for several years.

It seems that adversity(逆境) and suffering benefit these trees in ways comfort and ease never could. I stood there deep in thought.

Every night before I go to bed, I check on my two sons. I stand over them and watch their little bodies, the rising and falling of life within. I often pray for them. Mostly I pray that their lives will be easy. But I think that it’s time to change my prayer(祷词) because now I know my children are going to encounter hardship.

According to Dr. Gibbs’ theories, trees will become weaker if they _________.

A. are lack of care　　　　　B. are watered      C. are weeded out　　　　　D. are beaten

According to Para.3 and Para.4, we can infer that Dr. Gibbs’ motto(座右铭) may be       .

A. “Seeing is believing”                                    B. “Put everything in proper use”

C. “Practice makes perfect”                               D. “No pain, no gain”

The underlined word robust in Para.5 most probably means _________.

A. strong　　                      B. strange　　       C. deep　　                        D. old

Which of the following may be the author’s best prayer for his two sons now?

A. I wish them strong wings, with which they can fly higher and touch the sky.

B. I wish them nice fortune so that they can meet people like Dr. Gibbs in the future.

C. I wish them deep roots into the earth since the rains fall and the winds blow often.

D. I wish them great shades under the tree since the sunlight is always sharp and bitter.

Which of the following can be the best title of this passage?

A Nice Doctor  B. The Deep Roots  C. Adversity and Suffering  D. My Childhood Memory

　　Armstrong’s gift was obvious from the start of his career. His earliest recordings—first with a band led by his former teacher, Joe “King” Oliver, and then with his own band-earned Armstrong international fame for technical originality （独创性）. He freed his playing from the ordinary rhythms of early jazz by creating musical phrases that seemed to oppose the pulse of a song, only to combine them in the place later. His deep and rough voice became as special as his cornet（短号）playing, especially in his scat performances. Scat is a singing style in which meaningless syllables（音节）are repeated without preparation. Armstrong’s scat was among the earliest ever recorded.

　　By 1930, Armstrong had turned to more commercial, less experimental jazz. Some musicians criticized（批评）him for this. But others insisted that the real power of Armstrong’s art lay in its grace and sensitivity, fine qualities of the heart which remained in his music.

　　In the following years, Armstrong traveled around the world as the leading “goodwill ambassador（大使）”of American jazz music. The gentleness and great attraction of “Satchmo” filled his music and made him one of the world’s most beloved performers for over forty years.

　　1．Which of the following best tells what this passage is about?

　　A．Armstrong’s personal attraction.

　　B．Armstrong’s best work.

　　C．A praise for Armstrong’s contribution to jazz.

　　D．A comparison of Armstrong’s music with that of earlier musicians.

　　2．Why was “Satchmo” criticized by some of his workmates in the 1930s?

　　A．For making fewer recordings.

　　B．For losing interest in music.

　　C．For giving up his scat performances.

　　D．For turning his attention away from making changes

　　3．Which of the following is not mentioned as one of the reasons for Armstrong’s success?

　　A．His technical originality.

　　B．His personality.

　　C．His early experiences in “King” Oliver’s band.

　　D．His recordings were the first ever made.

　　4．According to the author, what made Armstrong the “goodwill ambassador” of American jazz music?

　　A．His world travels.

　　B．His attraction and sensitivity.

　　C．His scat singing.

　　D．His preference for commercial, less experimental jazz.