Unit 3 Life in the Future
单元测试
一、听力
二、单项填空（共15小题；每小题1分，满分15分）
从所给的四个选项(ABC和D)中，选出可以填入空白处的最佳选项。
21. He expected there______ another chance to go abroad.
A. is B. being C. to be D. has
22. “The interest ______ _be divided into five parts, according to the agreeent ade by both sides. ” declared the judge.
A. ay B. should C. ust D. shall
23. To has always thought of hiself as a good cook and never fails to _____everyone of it.
A. reeber B. know C. introduce D. reind.
24. The accident was supposed______ due to careless driving.
A. to happenB. to have happened
C. happening D. having happened
25. It isn’t yet known how these huge stones were conveyed_____a distance of 3800 kiloetres 30000 years ago.
A. at B. for C. over D. in
26. A odern city has been set up in ____was a wasteland ten years ago.
A. what B. which C. where D. that
27. He will join us _____the understanding that we divide all the profits equally.
A. in B. for C. on D. to
28. ______ _he is kind to e, I dislike hi in a way.
A. As B. When C. While D. Since
29. ______ __ a reply, he decided to send another e-ail.
A. Not receiving B. Receiving not
C. Not having received D. Having not received
30. Tough ______ _oney, his parents anaged to to send hi to a key university.
A. lacked B. lacking of C. lacking D. lacked in
31. It is required that the plan______ __out firly.
A. be carried out B. ust be carried C. will be carried D. carries
32. Beyond ______ _stars, Fei Junlong saw nothing but______ _ space.
A. x; the B. the; x C. x; x D. the; the
33. —Can we ski on this ountain?
----Of course. However, at no tie ______ _you do so alone.
A. could B. ight C. need D. ust
34. Oh, what a pity! It_____ so easy for e to bring those photos I wanted to show you. , but I have left the at hoe.
A. would have been B. would be C. had been D. was
35. To keep healthy, Professor Johnson ______ cycling as a regular for of exercise after he retired.
A. ade up B. put up C. took up D. carried out
三、完形填空（共20小题；每小题1。5分，满分30分）
阅读下面短，从短后各题所给的四个选项(ABC和D)中，选出可以填入空白处的最佳选项。
What kind of hoes will we live in the future? 36 can be sure，but scientists are working 37 new ideas now．
Soe scientists are 38 about building whole cities under huge glass does（圆顶）． 39 ， advanced heating and cooling systes will be 40 to control the weather in the does．41 ，there will never be any 42 or snow，and the teperature will always be 43 ．
Perhaps everyone will live in vertical（垂直的）cities — high rises 44 are so large that they can45 all the necessities of life．Since vertical cities will use 46 land than flat cities，and provide hoes 47 ore people，they will be practical for sall countries that have 48 population．
49 idea that will be helpful to sall countries is the 50 city．onaco has already built hoes, stores，and offices 51 the water of the editerranean Sea．
There are soe people who think that we will go back to 52 in caves． 53 the caves of the future will be very different fro the caves of the Stone Age．Fars and parks will be on the land 54 the cave city．When people want to go to the country or to a park，a short ride in a 55 will take the there．
36. A． Soebody B． Anybody C． Nobody D． Everybody
37. A． off B． out C． in D． by
38. A． thinking B． considering C． iagining D． suggesting
39. A． On the other hand B． As a result
C． Of course D． At the sae tie
40. A． possible B． suitable C． pleasant D． necessary
41. A． Siilarly B． Therefore C． According to D． oreover
42. A． cloud B． rain C． wind D． ice
43. A． cool B． war C． cofortable D． satisfied
44. A． that B． they C． where D． who
45. A． construct B． continue C． reain D． contain
46. A． wider B． ore C． less D． fewer
47. A． on B． to C． with D． for
48. A． a sall B． a large C． a few D． any
49. A． One B． Second C． Next D． Another
50. A． floating B． flowing C． shipping D． blowing
51. A． in B． above C． over D． on
52. A． live B． be living C． living D． having lived
53. A． Also B． But C． Then D． Again
54. A． in B． under C． beside D． over
55. A．lift B． underground C． plane D． bus
四、阅读理解(共20小题，每题2分，满分40分)
阅读下列短，从每题所给的四个选项(A、B、C、D)中，选出最佳选项。
A
The year is 2094. It has been announced that a coet (彗星) is heading towards the Earth. ost of it will iss our planet, but two pieces will probably hit the southern half of the Earth.
On 17 July , a piece four kiloeters wide enters the Earth’s atosphere with a assive explosion. About half of the piece is destroyed, but the reaining part hits the South Atlantic at 200 ties the speed of sound. The sea boils and a huge hole is ade in the sea bed. Huge waves are created and spread outwards fro the hole. The wall of water, a kiloeter high, rushes towards southern Africa at 800 kiloeters an hour. Cities on the African coast are totally destroyed and illions of people are drowned.
Before the waves reach South Aerica, the second piece of the coet lands in Argentina. Earthquakes and volcanoes are set off in the Andes ountains. The shock waves ove north into California and all around the Pacific Ocean. The cities of Los Angeles, San Francisco and Tokyo are copletely destroyed by earthquakes. illions of people in the southern half of the earth are already dead, but the north won’t escape for long. Because of the explosions, the sun is hidden by clouds of dust, teperatures around the world fall to alost zero . Crops are ruined. The sun won’t
be seen again for any years. Wars break out as countries fight for food. A year later, no ore than 10 illion people reain alive.
Could it really happen? In fact, it has already happened ore than once in the history of the Earth. The dinosaurs were on the Earth for over 160 illion years. Then 65 illion years ago they suddenly disappeared. any scientists believe that the Earth was hit by a piece of object in space. The dinosaurs couldn’t live through the cold cliate that followed and they died out. Will we eet the sae end?
56．What is ainly described in the passage?
A．A historic discovery. B．An event of iagination.
C．A research on space. D．A scientific adventure.
57．When the first piece hits the South Atlantic, it causes .
A．an earthquake B．daages to cities
C．an Earth explosion D．huge waves
58．Why can’t the northern half of the earth escape for long?
A．Because the land is covered with water
B．Because the light and heat fro the sun can not reach the earth.
C．Because people there can not live at the teperature of zero.
D．Because wars break out aong countries .
59．By giving the exaple of dinosaurs, the author tries to prove .
A．anials could not live in the cold cliate
B．what happened 65 illion years ago was an invented story
C．the huan beings will die out in 2094
D．the Earth could be hit by other objects in space

B
We often think of future. We often wonder what the world would be like in a hundred years’ tie.
Think of space， perhaps a peranent(永久的) station on the oon will have been set up. Perhaps people will be able to visit the oon as tourists. Cheap rockets for space travel will have been developed，peritting long journeys throughout the solar syste(太阳系). When that tie coes， people will be taking holidays in space and visiting other planets. Great progress will have been ade in edicine， too. Perhaps a cure will have been discovered for the ost terrible
of all diseases—cancer. Pollution is a proble we ust solve. In hundred’s years’ tie it will have been controlled.
All the world will have been developed — even Antarctica. There will be large cities in Antarctica. We already have supersonic(超音速的) flight， but in a hundred years’ tie we will have supersonic land travel as well.
We will have used up ost of earth’s land to build our cities， so floating cities will have been built. The Japanese already have plans for cities of this kind. And there will be cities under the sea. The first of these will have been copleted.
60. We will have developed ______ in a hundred years’　tie， peritting long journeys all over the solar syste.
A. cheap rockets for space travel B. a plane
C. a spaceship D. a satellite
61. an will also have supersonic land travel ______ .
A. in a year B. about half a century later
C. in the year 2050 D. about a century later
62. The last paragraph ainly talks about ______ .
A. we’ll ake good use of space on the earth
B. cities under the sea
C. Japan will first build floating cities
D. earth’s land is in danger
63. The best title for the passage is ______ .
A. Travel in the Future B. Future Life
C. Where to Live in the Future D. Space Travel
C
Soe people are pessiistic(悲观的) when they think about the future. They say that，a hundred years fro now， we will have used ost of the earth’s resources. We will have polluted our seas badly，and be unable to eat fish fro the. We will have ade the air so dirty that we will need to wear asks. The world’s population will have doubled， and we will have used all the countryside for housing; there will be no farland left.
Other people believe that an adapts very easily. They have a different idea of the future. How， in their views，will people be living in a hundred years’ tie？
One architect believes that an will ove off the land. He suggests that the city of the future will be a huge， pyraid-shaped building， which will be floating on the surface of the sea. About 5，000 failies will be living there，and the building will contain shops and schools as well as hoes. By living on the sea，we will give the farers ore land to grow crops.
As for oil，people will no longer need it: we will be heating our hoes with power fro the sun. And we will not be short of inerals， because there are plenty under our oceans. At the oent， we do not have the technology to get the out. But， in a hundred years’ tie， the optiists say， the new sea cities will be using these resources.
What will be in the shops in the year 3000？ What will people be wearing？ Hoill people be traveling？
Scientists who ake predictions about the future suggest that， by the year 3000， shops will no longer exist. Coputers will have replaced the; and people will order goods fro hoe.
People will be wearing very light, thin clothes. By this tie, scientists will have invented a fabric that keeps us cool in hot weather and war in cold weather.
As for travel， the experts say that ost people will be using public transport. Electric cars will be traveling through the streets day and night. Anybody will be able to stop one and use it.
An interesting picture. Unfortunately, we will not be there to see if these predictions coe true.
64. Pessiists believe that in the future ______ .
A. the seas and oceans will be full of houses
B. we’ll have used up all the resources
C. we will not have enough fish to eat fro the seas
D. we will have polluted the air so badly that it will be ipossible for us to breath
65. Optiists suggest that ______ .
A. all the land will be too polluted to be cropped on
B. pyraids will be the ost coonly-used houses
C. people will be using the power fro the sun instead of oil
D. we will be short of aterials even though we get the fro under the oceans
66. Scientists have ade the predictions EXCEPT ______ .
A. electric cars will be going along the streets continuously
B. the resources under the oceans will never be used up
C. people will order fro hoe
D. people won’t suffer fro cold any longer
D
The new odel is the highly interactive（互动的）learning odel. We could also call it the conversational odel, or the tutorial odel. It is coputer based, with the interaction between the student, or a sall group of students, and learning progras are like the conversation between a student and a skilled tutor. Distance learning will be the ain delivery ethod.
Student interaction with the learning aterial on the coputer will use the student's natural language; it will see like a conversation between a student and a huan tutor. This is the key point of highly interactive, or conversational, learning units. Progras will ask questions in the student’s native language, and respond reasonably to free-for student input. ultiple choice and pointing will seldo be used; they often do not allow individualization (个体化) of education.
An iportant aspect of this odel is that the coputer will frequently store inforation about the student, about probles and about how far individual students have progressed. These records will be used often within the progras. Thus when a student returns to the learning activity, the coputer knows about that student and knows where to begin the new part.
Global education is critical for the future, to get rid of poverty, corruption (腐败), violence and war, to solve ajor probles such as the lack of drinkable water, and to insure a happy life for all. Education should no longer be liited to the wealthy of the world, but should be available to everyone.
In the new distance learning environent learning can take place in arkets, libraries, public buildings, learning centers, and the hoe. Gradually schools and universities will play a saller role in learning, both because better learning can be delivered through such highly interactive aterial, and because such learning will be less costly for the individual student. otivation (动机)is particularly iportant in a astery-based distance learning, as the usual threats of traditional classroos such as that of low grades are no longer possible,
Voice input will probably be the ode for this interaction. The new voice input systes fro several copanies are useful, cheap, and speaker independent in highly interactive learning. Keyboards ay not be needed. Speech is a natural way for huans to counicate.
Students will work in sall peer groups, about four. Other contacts with people, learning circles, will be possible, directly or electronically.
67. What is not the new odel also called?
A. interactive odel B. conversational odel
C. tutorial odel D. linguistic odel
68. What does the odel often use?
A. individualization of education
B. ultiple choice and pointing
C. questions in students’ native language
D. fixed-for student inputwwxkb1.co
69. What do coputers detect students about?
A. Their future achieveents B. Their intelligences
C. Their probles D. Their failies
70. According to the passage, distance learning is ______ .
A. still expensive for ordinary students
B. will take place ainly in classroos.
C. will play ore role in students’ learning.
D. will still affect badly on the low-graded students
71. What is the Chinese for the underlined word “tutorial” in the firsr paragraph?
A. 辅导 B. 教具 C. 学费 D. 奖学金
E
Olaf Stapledon wrote a book called First and Last en, in which he looked illions of years ahead. He told of different en and of strange civilizations, broken up by long 'dark ages' in between. In his view, what is called the present tie is no ore than a oent in huan history and we are just the First en . In 2, 000 illion years fro now there will be the Eighteenth or Last en.
　 However, ost of our ideas about the future are really very short-sighted. Perhaps we can see soe possibilities for the next fifty years. But the next hundred? The next thousand? The next illion? That's uch ore difficult.
　When en and woen lived by hunting 50, 000 years ago, how could they even begin to picture odern life? Yet to en of 50, 000 years fro now, we ay see as priitive in our ideas as the Stone-Age hunters do to us. Perhaps through the spundels and ballalators, these words, which I have just ade up, have to stand for things and ideas that we siply can't think of.
So why bother even to try iagining life far in the future? Here are two reasons. First unless we reeber how short our own lives are copared with the whole huan history, we are likely to think our own interests are uch ore iportant than they really are. If we ake the earth a poor place to live, because we are careless or greedy or quarrelsoe, our grand-children will not bother to think of excuses for us. Second, by trying to escape fro present interests and iagine life far in the future, we ay arrive at quite fresh ideas that we can use ourselves. For exaple, if we iagine that in the future en ay give up faring, we can think of trying it no So set you iagination free when you think about the future.
72. A particular ention ade of Stapledon's book in the opening paragraph ______ ______
A. serves as a description of huan history
B. serves an introduction to the discussion
C. shows a disagreeent of views
D. Shows the popularity of the book
73. The text discusses en and woen 50, 000 years ago and 50, 000 years fro now in
order to show that ______ ___.
A. huan history is extreely long
B. life has changed a great deal
C. it is useless to plan for the next 50 years
D. it is difficult to tell what will happen in the future
74. Spundels and ballalators are used in the text to refer to ______ ___.
A. tools used in faring
B. ideas about odern life
C. unknown things in the future
D. hunting skills in the Stone Age
75. According to the writer of the text , iagining the future will ______ ___.
A. serve the interests of the present and future generations
B. enable us to better understand huan history
C. help us to iprove faring
D. ake life worth living
五、短改错（共10小题；每小题1分，满分10分）
此题要求改正所给短中的错误。对标有题号的每一行作出判断：如无错误，在该行右边横线上画一个勾（√）；如有错误（每行只有一个错误），则按下列情况改正：
此行多一个词：把多余的词用斜线（?）划掉，在该行右边横线上写出该词，并也用斜线划掉。
此行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
此行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
注意：原没有错的不要改。
A helicopter is soetie ore useful than a big plane. When 76. ______ ___
it takes off, it goes straight on. When it lands, it coes 77. ______ ___
straight down. It needs not only a sall place for both taking 78. ______ ___
off and landing. When a tall building is on fire, we can 79. ______ ___
see a helicopter to coe down to rescue the people on the top 80. ______ ___
of the. Helicopters ake any kinds of work easy. They 81. ______ ___
are used to aking aps, flying over the ground and taking 82. ______ ___
pictures fro the air. To rescue people who are very 83. ______ ___
sick or in danger, helicopters are send to soe faraway 84. ______ ___
areas. The helicopter ay take place of a car or a train 85. ______ ___
in soe cases.
六、书面表达（满分25分）
假设你是一位中学生，叫李平，听说你所居住的城市拟在你市名胜之一的云霞附近建一座发电站。请给某英语报社写一封信，对这一表示反对，并陈述理由。信的内容须包括以下要点：
1）承认发电站将给本市提供充足的电力，促进本市经济发展。
2）我和很多市民都反对这一。
3）修建发电站需搬迁很多人口和砍伐大量的树木。
4）云霞的风景一旦被破坏，将再也无法恢复。
要求：
1）词数：100个左右。
2）不可逐字翻译，但可适当增加内容，使行连贯。
3）参考词汇：云霞 t. Yunxi
Unit 3 参考答案与提示
I、听力原：
第一节 听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间回答有关小题和阅读下一小题。每段对话仅读一遍。现在，你有5秒钟的时间阅读第一小题的有关内容。
Text One
W：Jack, you look unhappy today!
：Yes. However hard I try, y English is still not good enough.
Text Two
W：There see to be increasing traffic accidents near the shopping all.
：Perhaps a tunnel could solve the proble.
W：Sounds a good idea.
Text Three
W：Could I have an intervieith you for a progra at 10:00 toorrow orning, Doctor Johnson?
：I’ sorry, iss Brand. I’ll be eeting y students then. What about 30 inutes later?
W：Ok, we will eet then.
Text Four
：iss Linda, would you please have this typed and copied before Friday?
W：Yes, how any copies do you want?
：Twenty, please.
W：No proble. I’ll take the to your office this afternoon.
Text Five
W：Hello, Tony. Where were you last night?
：I had to stay at hoe.
W：But you issed a really wonderful concert!
：Don’t tell e about it! I would have gone if I had got the oney.
第二节 听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听每段对话或独白前，你都有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。
听第6段，回答第6至8题。
W：Hi, Paul. Are you at hoe? And what are you doing now?
：I’ playing a coputer gae.
W：Do you want a gae of tennis at the Youth Club tonight? We need one ore player.
：Oh, y parents are always out on Wednesday evenings and I have to look after y little brother. Probably I can’t do it for you.
W：Never ind. Then I’ll call soeone else and have a try.
：Hold on! Keith is with e no She’s good at tennis. I’ll ask her whether she’d love to.
W：Great! Anyway, thank you, too!
听第7段，回答第9至11题。
W：Are you interested in usic, r. Roger?
：Yes, I like classical usic, but jazz is y favorite, and y wife is crazy about rock usic.
W：You play the piano, don’t you?
：A little bit, but y wife is uch better than e. She can also play the violin.
W：Really? I hope I can hear her play soe day.
：Why not coe to our house this weekend? We are going to have a party.
W：Thank you. I’d love to.
听第8段材料，回答第12至14题。
：What were you doing at twelve last night?
W：I was playing cards with y kids in the kitchen.
：Do your kids always go to bed that late?
W：Not on weekdays.
：Wasn’t your husband with you then?
W：He was away on business in Seattle. He will be back late this evening.
：Anything unusual happened?
W：The light suddenly went out while we were playing. We reained silent at the table for soe oents. After a while, we all heard glass breaking soewhere on the floor above.
：Do you ean a window?
W：I’ not sure whether it was a window or a glass or soething else.
：Didn’t any one of you hear a cry or a fight? Didn’t you even consider going up for a look?
W：We were frightened at the beginning and then went to bed as it was quiet all around.
听第9段材料，回答第15至17题。
W：Our flight has delayed 2 hours. y husband will be waiting anxiously at London Airport.
：You’d better ake a phone call and tell hi of the situation here.
W：Right. What are you here for?
：I was at a two ? week international conference on Space Technology in Beijing.
W：How interesting! I was there with a tour.
：Really? How did you find it?
W：Beijing deserves the capital of this country. Apart fro Beijing, I went to Shanghai, Hangzhou and Nanjing. Those trips are aong the ones I’ve ever enjoyed ost. China is really rich in history and tradition. Is this your first trip to China?
：No. I coe here every year but always on business. I have had no chance to visit tour spots
W：What a pity! Excuse e. I’ll phone y husband.
听第10段材料，回答第18至20题。
Here’s the latest news fro the police departent. Paul Grant, head and the last of the gang responsible for ore than ten robberies, including the City Bank robbery last Deceber, was arrested in Chicago at 4:15 this orning. He had been able to escape arrest for the past four years until today, hiding in several different locations. The police found hi with the help of a responsible citizen, who had infored about his last hiding place. Officer Henry Newan spotted Grant the oent he appeared early orning in a drugstore near where he was living and arrested hi before he could react. The criinal is now in prison under heavy guard, waiting to be tried. Thank you for listening.
II、参考答案与提示：
一、1～5 CCBCB 6～10 ACBCA 11～15 BBACA 16～20 CACBB
二、21. 选C。expect接动词不定式。
22. 选D。法律条要用shall。xkb1.co
23. 选D。reind sb of提醒某人做某事。
24. 选B。表示过去的动作用动词不定式完成式。
25. 选C。表示越过一段距离。
26. 选A。what=the place that引导名词性从句作介词宾语。
27. 选C。“on the understanding that”是固定短语，表示只要。
28. 选C。while表示“虽然，尽管”。
29. 选C。分词的否定放在分词前面。
30. 选B。从句省略。
31. 选A。require后接从句用动词原形。
32. 选B。恒星前不用冠词，表示太空是不可数名词不与冠词连用。
33. 选D。ustn’t表示禁止。
34. 选A。虚拟语气表示与过去事实相反的假定。
35. 选C。take up表示从事。
三、36. 选C。没有人能够肯定未的家园是什么样子的。
37. 选B。work out new ideas意思是“想出一些新的主意”。
38. 选A。think about意思是“思考”，“考虑”。
39. 选C。on the other hand意思为“另一方面”；as a result意思为“结果”；of course意思为“当然”；at the sae tie意思为“同时”。
40. 选D。当然，必须要有先进的制冷和制热系统控制天气。
41. 选B。therefore意思为“因此”。
42. 选B。rain与snow相对应。
43. 选C。因为有制冷和制热系统控制，所以温度会让人觉得很舒适。
44. 选A。这是一个定语从句。
45. 选D。contian意思为“含有”，“内有”。
46. 选C。这种垂直的城市用的土地要少。
47. 选D。provide sth, for sb.意思为“为某人提供某物”。
48. 选B。这对于人口较多，城市较小的地方比较实用。
49. 选D。another意思为“另外一个”。
50. 选A。float意思为“漂浮”，此处为现在分词短语作定语。
51. 选D。因为是漂在水面上的，所以用on。
52. 选C。go back to doing sth.意思为“重操旧业”。这里是指又重新生活在洞穴里。
53. 选B。这里表示转折，但是，与石器时代的洞穴不同。
54. 选D。over是指在洞穴的上方。
55. 选A。lift意思为“电梯”。
四、56. 选B。描述了人类在2094年可能会遭遇的灾难。这些事情只是一种想象而已。
57. 选D。根据第二段可知，应该选D。
58. 选B。第三段中提到，南半球的数以万计的人已经死了，而北半球也逃脱不了这种厄运。因为太阳多年照不到地球，地球上的温度几乎降到了零度。植物遭到了破坏，食物缺乏，导致战争。所以，一切的根在于B选项。
59. 选D。答案在最后一段，作者举恐龙这一例子是为了说明地球很有可能再次遭遇袭击。
60. 选A。在太空方面，人类将开发出便宜的可用于太空旅行的火箭，可以在太阳系长途旅行。
61. 选D。第三段中提到，在一百年的时间里，我们同样也可以进行超音速陆地旅行。
62. 选A。最后一段提到，人类将不仅使用地球上的大部分土地建造城市，而且还将在海上建造漂浮城市，以及在海底建造海底城市。这说明人类充分利用了地球上的空间。
63. 选B。能第一段就是的中心。
64. 选D。答案在第一段，悲观的人认为一百年之后，人类用光了大部分资；海洋受到了严重的污染，鱼因为污染已经不能食用；空气因为受到严重污染，人们必须要戴着面具。
65. 选C。第四段提到，人们将不在使用石油，而是利用太阳能取暖。
66. 选 B。答案在最后四段，并未提到B项。
67. 选D。根据第一段“The new odel is the highly interactive（互动的）learning odel. We could also call it the conversational odel, or the tutorial odel.”可知，应该选D。
68. 选C。答案在第二段，“Progras will ask questions in the student’s native language,”这句话表明，C项是正确的。
69. 选C。答案在第三段。
70. 选C。根据第五段“Gradually schools and universities will play a saller role in learning, both because better learning can be delivered through such highly interactive aterial, and because such learning will be less costly for the individual student.”可知，远程教育在学生的学习方面起着更为重要的作用。
71. 选A。我们把这种高效互动的模式称之为对话模式或者辅导模式。
72. 选Ｂ。该题实际就是问第一自然段的主题，如果看出这一点，答案即可自然而然得出。
73. 选Ｄ。从第三自然段可类比得出答案。
74. 选Ｃ。那是作者编的词指未的事，ake up编造。
75. 选Ａ。想象未对现在对下几代均有好处。而不仅仅是改进农业，理解人类历史。
五、76. soetie改成 soeties。soetie意思为“某时”；soeties意思为“有时候”。
77. on改成 up。飞机起飞是向上的。
78. 去掉not。 这里应该是“仅仅”的意思。
79. 正确。
80. 去掉第一个to。see sb. to do中的不定式符号to必须要省略。
81. the改成it。 与上的a helicopter一致。
82. aking改成ake。be used to do sth.意思为“被用做某事”。
83. who改成who。 定语从句，who指代先行词作主语。
84. send改成sent。 这是一被动句。
85. place前加the。take the place of意思为“代替”。
六、One possible version:
Dear Editor,
I’ a iddle school student. I hear that a power station will be built near t. Yunxia, a place of interest. We know the power station will provide us with plenty of power and as a result, the local econoy will develop rapidly, but any citizens and I are against the plan. To build the power station, any people will have to ove away and a great nuber of trees will have to be cut
down. What’s worse, once the scenery of t. Yunxia is destroyed, it can never be restored. Therefore, this plan is not good for protecting the environent. We suggest the city governent should think over this plan.
Yours faithfully,
Li Ping

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