For thousands of years.mankind has bred plants and animals to create more desired and useful plants and animals. For instance, modem corn has been bred to such a large size that it is no longer able t 题目和参考答案——青夏教育精英家教网—

题目内容

For thousands of years，mankind has bred plants and animals to create more desired and useful plants and animals. For instance, modem corn has been bred to such a large size that it is no longer able to reproduce without man's assistance. Modem dairy cows produce too much milk;because if they are not often drained of milk,they could leak,burst, become infected, and possibly die. Furthermore, most domesticated dogs cannot survive in the wild even with special training. Since natural evolution is extremely slow and mankind's selective breeding pro?grams only take a few generations to produce a completely new species，natural evolution has al?ready taken a backseat to mankind's breeding programs.

Additionally，mankind has successfully killed off several species all together. For instance， there are no more European wolves in existence and mammoths probably become extinct because of mankind. Even certain diseases have been permanently eradicated(根除) from the planet, and dozens of other diseases will soon be too. Again, natural evolution did not cause most of the ex?tinctions during humanity's reign.

Currently, scientists are creating new species with desired characteristics in the lab signifi?cantly faster than natural evolution creates new species. In a single generation, new species can be artificially created and destroyed，while natural evolution could take thousands of years to do the same but only haphazardly(4禺然地) .Scientists are even able to replace flawed(有缺陷的) or damaged genes with different genes to attempt to cure genetic defects. This is something that natural evolution could possibly never correct.

Eventually scientists will be able to enhance even people. For example, imagine not only correcting your eyesight with gene therapy，but also ensuring that all of your descendants do not inherit your old genes of poor eyesight too. Scientists will one day be able to enhance the mem?ory and intelligence of your children，so that they will do better in school and achieve more in life. Doctors and scientists will be able to customize babies before they are born just like picking options at a car dealership.

In the near future，natural evolution in the genetic code of any species can be quickly fixed if desired. As a result, natural evolution is doomed.

( ) 1. The underlined word "backseat" probably means .

A. powerful assistance B. important part

C. bad fortune D. secondary position

( ) 2. We can learn from the passage that .

A.artificial evolution can benefit the mankind

B.humans' flaws won't be inherited in future

C.natural evolution can't change species' nature

D.artificial evolution helps choose human sexes

( ) 3. Through the passage the author mainly wants to tell the readers that .

A.natural evolution survives strongly

B.natural evolution is almost dead

C.artificial evolution brings humans interests

D.artificial evolution causes species' extinction

( ) 4. We can infer from the passage that .

A. artificial evolution is the future B. artificial evolution causes mess

C.natural evolution causes species to die D. natural evolution will completely stop

1-4 DAB A

A数千年来，人类根据自己的需要，创造了无数新的动植物物种；与此同时，自然进化却在逐渐消退和衰落。未来属于人工进化。

1. D词义猜测题。参见第4题的注释，自然进化让位于人工培育,所以巳经处于"次要的地位"了。

2.A推理判断题。根据第三、四段可知，人工进化可以避免一些有缺陷和损坏了的基因，可以用于医学，使人的品质得到改进,避免不良基因的遗传，等等，由此可知，人工进化可给人类带来好处。

3.B主旨大意题。第一和最后一段相呼应，强调了自然进化的衰退和枯竭，换句话说：自然进化几乎死亡,这便是本文作者想要告诉读者的观点。根据第二、三段可知，人工进化具有优劣双重性。

4.A推理判断题。第一段说人类培育出了很多物种，与此同时自然进化缓慢,已经让位于人工物种培育(见最后一句) ；接下来的三段围绕着人工培育的优缺点展开了讨论，都表现出其强大的力量，以及自然进化的衰退。由此可推知，人工进化将是未来的主流。最后一段也给予了呼应。

练习册系列答案

报纸

1. 传统平面媒体，天天更新，信息可靠。

2. 携带方便，随时随地可以阅读。

3. 仅有文字和图片。

网站

1. 新兴媒体，信息更新速度快。

2. 依赖于电脑及互联网。

3. 包含文字、图片、音频和视频等。

注意：

1.短文必须包括表中所有内容，可以适当发挥；

2.词数:120;

3.参考词汇：更新update;音频audio;视频video 生词提示

come out出版reliable可靠contain包含audio音频video视频update更新convenient方便的

4.The large firm where these are seen to be really necessary, (opposed)

这家大公司不反对认定确有必要的改变。

Keeper of the Spring

There was an old man who lived high above an Austrian village along the eastern slope of the Alps.

The old gentleman had been 1 many years before by the town council to clear away the debris(垃圾) from the pools of water that fed the lovely spring flowing 2 their village. With faithful，silent regularity，he removed the 3 and branches，and wiped away anything that would otherwise have choked and polluted the fresh flow of water. The village soon became a popular 4 , for tourists.

Years passed. One evening the town council met for its semi-annual 5 . As they re?viewed the 6 , a man noticed the small amount 7 to the keeper of the spring. The man said, "Who is he? Why do we keep him on the list year after year? No one ever 8 him. For all we know,the strange ranger of the hills is doing us no good,it isn't 9 to keep him any longer.”By a vote,they dispensed with(解除) the old man's services.

For several weeks, nothing 10 .

By early autumn,leaves began to 11 Small branches fell into the pools, hindering(阻塞) the rushing flow of water. One afternoon someone 12 a slightly yellowish-brown color in the water. A few days later, the water was much 13 . Within another week,a slimy film 14 sections of the water along the banks,and it was smelly. Birds left,as did the 15 . Disease and sickness 16 deeply into the village.

Quickly, the 17council realized their error in 18 . They rehired the old keeper of the spring, and within a few weeks, the river began to 19 and the village came back to life.

Never 20 the seeming smallness of your task,job,or life.

( ) 1.A. allowed B. inspired C. hired D. served

( ) 2.A. on B. at C. over D. through

( ) 3.A. birds B. leaves C. banks D. trees

( ) 4.A. attraction B. station C. direction D. expression

( ) 5.A. opening B. meeting C. organization D. celebration

( ) 6.A. debt B. rule C. dairy D. budget

( ) 7.A. taught B. paid C. permitted D. borrowed

( ) 8.A. orders B. reminds C. sees D. respects

( ) 9.A. optimistic B. strong C. comfortable D. necessary

( ) 10.A. worked B. changed C. began D. arrived

( ) 11. A. fall B. grow C. gather D. wave

( ) 12. A. mixed B. recognized C. noticed D. painted

( ) 13. A. fresher B. clearer C. colder D. darker

( ) 14. A. covered B. protected C. removed D. formed

( ) 15. A. keeper B. spring C. tourists D. branches

( ) 16. A. gave B. reached C. got D. knew

( ) 17. A. excited B. encouraged C. embarrassed D. frightened

( ) 18. A. experiment B. preparation C. knowledge D. judgment

( ) 19. A. clear up B. set off C. bring in D. look around

( ) 20. A. look down upon B. be satisfied with

C;be concerned about D. think highly of

4.Write home as often as possible when you're far away from your parents so as . (anxiety)

当你远离父母时，尽量多给家里写信，让你母亲宽慰，免得担心。

Last Tuesday was rainy. Still, I drove to visit my daughter Carolyn and my grandchildren as I had promised. When I finally walked into Carolyn's house and 1 them,she said, "Mom,you must go to see the narcissi(水仙花) before they are 2 ."

"3the narcissi， Carolyn！The road is 4 to drive on in the rain， and there is noth?ing in the world except you and these children that I want to 5 in such a bad weather！"

My daughter smiled 6and said, "Trust me,Mom. You will never 7 yourself if you miss this experience.”

After driving about twenty minutes, we saw a small church. On the far side of the church, I saw a sign 8 ，"Narcissus Garden".

We got out of the car,and I followed Carolyn down the path. Then,as we turned a cor?ner,I looked up and was 9 . Before me lay the most amazing 10 . It looked as though someone had a great vat of gold and poured it over the mountain and its surrounding slopes. The flowers were 11 in swirling(旋涡状的) patterns，great ribbons of deep orange，creamy white, lemon yellow, salmon pink,and saffron and butter yellow. Each different colored varie?ty was planted in large 12 so that it swirled and flowed like its own river with its own u-nique color. "But who 13 this?" I asked Carolyn. "It's just one woman," Carolyn an?swered. She 14 a well-kept small house. We walked up to it. In the yard,we saw a post?er. "Answers to the Questions I Know You Are Asking" was the 15 . The first answer was a 16 one. "50，000 bulbs(球茎) ”，it read. The second was, "One at a time,by one woman. Two hands, two feet,and one brain. " The third was, " 17 in 1966."

This unknown woman had created something of indescribable 18 . Learn to move to?wards our goals one step at a time，learn to 19 what we are doing，and learn to use the time well. By doing so,we can 20 the world.

( ) 1.A. informed B. taught C. greeted D. invited

( ) 2.A. over B. lost C. bent D. broken

( ) 3.A. Sell B. Leave C. Water D. Forget

( ) 4.A. dangerous B. hard C. clean D. wide

( ) 5.A. see B. defeat C. instruct D. welcome

( ) 6.A. calmly B. proudly C. easily D. nervously

( ) 7.A. protect B. permit C. hate D. forgive

( ) 8.A. talking B. speaking C. saying D. knowing

( ) 9.A. inspired B. satisfied C. depressed D. shocked

( ) 10.A. progress B. sight C. place D. poster

( ) 11.A. planted B. cut C. stored D. pined

( ) 12.A. lines B. rows C. groups D. teams

( ) 13.A. won B. enjoyed C. discovered D. made

( ) 14.A. searched for B. pointed to C. looked at D. thought of

( ) 15.A. answer B. text C. headline D. meaning

( ) 16.A. beautiful B. lively C. wide D. simple

( ) 17.A. Appeared B. Began C. Paused D. Finished

( ) 18.A. beauty B. price C. concern D. value

( ) 19.A. describe B. divide C. love D. correct

( ) 20.A. explore B. change C. watch D. know

It was New Year's night. An aged man was standing at a window. He 1 his sad eyes towards the deep blue sky，where the stars were 2 like white lilies (百合花) on the surface of a clear calm lake. Then he threw them on the earth,where a few more hopeless people than himself now moved towards their certain destination―the 3 . He had already passed sixty of the 4 leading to it,and he had brought from his journey nothing but error and regret. Now his health was poor,his mind 5 ，his heart sorrowful, and his old age short of6 The days of his youth appeared like dreams before him，and he recalled the 7 moment when his father placed him at the 8 to the two roads-------- one leading to a peaceful，sunny place， 9 with flowers，fruits and resounding with soft，sweet songs; 10 leading to a deep，dark cave，which was endless， 11 poison flowed instead of water and where devils and poisonous snakes hissed and crawled.

He saw the lights fading away in the darkness，and these were the days of his 12 life; He saw a star fall from the sky and disappeared, and this was the 13 of himself. His 14 ，which was like a sharp arrow,struck deeply into his heart. Then he remembered his friends in his childhood, who entered on life together with him. But they had 15 to success and were now honored and happy on this New Year's night.

The clock in the high church tower struck and the sound made him remember his parents' early love for him. They had taught him and 16 to God for his good. But he chose the 17 way. With shame and grief he 18 no longer look towards that heaven where his father lived. His darkened eyes were full of tears,and 19 a despairing(绝望的) effort,he 20 out a cry， " Come back，my early days！Come back！”

( ) 1. A. widened B. lifted C. opened D. fixed

( ) 2. A. floating B. flashing C. hanging D. shining

( ) 3. A. house B. tomb C. church D. birthplace

( ) 4. A. dreams B. moments C. incidents D. stages

( ) 5. A. strange B. pale C. blank D. shallow

( ) 6. A. allowances B. comforts C. experiences D. memories

( ) 7. A. serious B. awful C. tough D. desperate

( ) 8. A. end B. entrance C. origin D. base

( ) 9. A. mixed B. occupied C. satisfied D. covered

( ) 10. A. other B. the other C. another D. one more

( ) 11. A. which B. that C. whose D. where

( ) 12. A. accustomed B. rewarded C. wasted D. pleased

( ) 13. A. symbol B. fate C. future D. outcome

( ) 14. A. satisfaction B. success C. regret D. happiness

( ) 15. A. lost their heart B. devoted their attention

C. made their way D. given their way

( ) 16. A. prayed B. attached C. adjusted D. turned

( ) 17. A. ordinary B. unfamiliar C. wrong D. difficult

( ) 18. A. would B. could C. should D. dared

( ) 19. A. in B. with C. for D. by

( ) 20. A. burst B. gave C. shouted D. carried

4.Some of the previous examples showed how scripting attributes can behavior. (effect)

先前的部分实例说明使用脚本控制属性可以间接地影响到人的行为。

1. It is very obvious that the universe began with . (what)

很明显，宇宙起源于一次所谓的"大爆炸"。

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