ItisnowcommonlyknownthatAIDSis-优题课

第二部分阅读理解（共25小题，第一节每小题2分，第二节每小题1分；满分45分）
第一节，阅读下面短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
Bollworms are a traditional threat to cotton crops．Young ones feed on the boll，the part of the cotton plant that contains the seeds．
A bacterium known as Bt is able to kill bollworms and some other pests．Bt is the short form for Bacillus thuringiensis．It was discovered in the early twentieth century．Farmers began using Bt as a natural pesticide(杀虫剂)．
Then，in the 1990s，researchers found a way to grow cotton plants that contain a Bt gene．The genetically improved cotton plant produces liquid that kills bollworms．Farmers around the world are now growing an estimated fourteen million hectares of Bt cotton．
Cotton bollworms also attack other crops．But scientists in China recently reported that Bt cotton may help prevent bollworm in other crops growing nearby．
The study involved crops grown in six provinces of northern China between 1992 and 2008．The study area contained three million hectares of cotton and twenty-two million hectares of corn，peanuts，soybeans and vegetables．
The researchers say the study suggested that Bt cotton not only controls bollworm on the transgenic cotton，but also may reduce its existence on other crops．And that reduction，they say，may decrease the need for insecticide use in general．
But the researchers also pointed out concerns．They say bollworms could develop resistance to the cotton plants designed to resist them．And they noted that insects called mirids have become “key pests” of cotton in China．They said this is because of a decrease in pesticide use made possible by Bt cotton．
The researchers say they do not believe that Bt cotton alone can solve all insect problems．Instead，they say farmers in China should consider it just one part of pest management systems．
1．What is Bt in this passage?
A．It's a kind of hi-tech invention． B．It's a natural bacterium．
C．It's a kind of pest． D．It's a man-made pesticide．
2．Bt cotton has all the advantages EXCEPT that ________．
A．it resists bollworms
B．it does good to other crops growing around
C．it reduces the use of insecticide
D．it helps to develop new insects
3．The underlined word “ones” in the first paragraph refers to ________．
A．bollworms B．cotton crops C．cotton seeds D．pests
4．From the passage，we can infer ________．
A．farmers around the world are now growing a large area of Bt cotton
B．researchers are probably now searching for new ways to solve other cotton problems C．bollworms could not exist in Bt cotton any longer
D．Chinese scientists found the way to grow Bt cotton

Recently there was a major discovery in the scientific research—the mapping of all DNA in a human gene（基因）is complete.Couple of years ago,this seems an impossible task for scientist to accomplish.All this progress in science leads us to believe that the day,when the human being will be cloned,is not far away.Human cloning has always been a topic of argument，in terms of morality or religion.
Taking a look at why cloning might be beneficial,among many cases,it is arguable that parents who are known to be at risk of passing a genetic limitation to a child could make use of cloning.If the clonc was free of genetic limitations。Then the other clone would be as well.The latter could foe inserted in the woman and allowed to ripen to term.Moreover，cloning would enable women,who can’t get pregnant,to have children of their own.
Cloning humans would also mean that organs could be cloned,so it would be a source of perfect transfer organs.This,surely would be greatly beneficial to millions of unfortunate peoplearound the world that are expected to lose their lives due to failure of single(or more) organ
（s）.It is also arguable that a ban on cloning may be unlawful and would reb pepole of the right to reproduce and limit the freedom of scientists.
Arguments against cloning are also on a perfectly practical side.Primarily,I believe that cloning would step in the normal “cycle”of life.There would be a large number of same genes.,which reduce the chances of improvement，and,in turn,development-the fundamental reason how living things naturally adapt to the ever-changing environment. Life processes failing to do so might result in untimely disappearance.Futhermore,cloning would make the uniqueness that each one of us possesses disapparance.Thus,leading to creation of genetically engineered groups of people for specific purposes and,chances are,that those individuals would be regarded as “objects”rather than people in the society.
Scientists haven’t 100 percent. guaranteed that the first cloned will be normal.Thus this could result in introduction of additional limitations in the human “gene-pool”.
Regarding such arguable topics in “black or white” approach seems very innocent to me personally.We should rather try to look at all “shades:of it.I believe that cloning is only legal if its purpose is for cloning organs,not humans.Then we could regard this as for “saving life”instead of “creating life”.I believe cloning humans is morally and socially unacceptable.
67.Which of the following is true according to the passage？
A.Genetic limitation will be beneficial for some women
B.A large number of genes will prevent us from developing
C.Prohibition of cloning might limit the freedom of scientists
D.First cloned humans might be normal according to scientists
68.What’s the author’s oponion on cloning?
A.Cloning should be entirely banned
B. Cloning should be used in creating life
C. Cloning will take away the right to reproduce
D. Cloning is acceptable if it is used for cloning organs
69.Where can you read this article?
A.In a story book
B.In a magazine
C.In a science fiction
D.In a brochure
70.Which of the following shows the structure of the passage

With alarming regularity,we read about oil tankers having accidents near land and the terrible consequences of the oil spills(泄露) on people,nature,and the environment.
Millions of dollars have been used in developing special chemicals to help dismiss the spills and to clean up the animals,beaches,and land spoiled by the oil.Unfortunately,when many of these chemicals are used,,more damage is caused to the environment,especially to lives in the sea.
Of all of today’s environmental disasters ,an oil spill may actually be one of the least serious.Although oil is poisonous,it is a natual material.In the end,it breaks down naturally.There are,of course,long-term effects,but it is usually more serious in the short term.
Nature by itself woks better than chemical materials,but when there is a spill we demand that governments act immediately with as much hi-tech knowledge as possible.In 1967 the tanker Torrey Canyon sank off the Scilly Isles near the coast of England and spilled 120,000 tones of oil into the ocean,If you go there today,you will find it hard to see any sign that it ever happened.
Governments seem to accept the risk of transporting millions of tons of oil by ship every day so that we can fill up our cars and drive around and cause even more environmental
damage.Interestingly the biggest companies in the world produce cars, and the next biggest supply the gasoline to make them run I
We shoule be thinking more about reducing our dependency on oil,Governments should be encouraging research into new technologies，such as cars run by solar power（太阳能），electricity,
hydrogen，and so on.Much of this research has ,in the past been held back by the oil,gas,and coal.
If the world’s millions of cars were 10% more efficient（高效的）—and the industry could easily produce cars at least twice as efficient？we would need many fewer tankers crossing the oceans each year.If this happened,the risks of oil spills would be reduced，and the air we breathe would be cleaner and fresher ,too.
63.What is the passage mainly talking about?
A.Oil spills pollution B.What oil pollution is
C.Oil tanker accidents D.How to reduce oil pollution
64.How does the author support the idea that oil spills are not as serious as people believe？
A.By giving a description B.By making an argument
C.By giving an example D.By drawing a diagram
65.What does the underlined word “risk”in paragraph 5 refer to?
A.Tansportation depending more on oil
B.Poisonous oil breaking down naturally
C.Millions of tons of oil spilling into the sea
D.More environmental damage being caused
66.Which suggestion，is made for reducing oil tank accidents according to the passage?
A.We should build safer tankers in the near future
B.We shoule develop new technologies to cut oil use
C.Tankers should not be allowed to sail near the coastlines
D.Countries should bulid more oil pipelines under the sea

FOR Chinese students the end of their senior year is filled with studying and stress as they prepare for the college entrance exams in June.But for American high school seniors the experience couldn’t be more different. The end of senior year is a celebration of their time in high school and involves parties,games and fun.
Senioritis is a commonly used expression.It means seniors have a disease which makes them unable to do work.This starts in April when seniors find out whether they have been accepted to university.
Unwilling to do school work,seniors have plenty of other activities to focus on.
Many schools have a “Senior Show”,in which only seniors are allowed to perform.Some seniors sing or dance but many of them perform skits（滑稽短剧），where they make fun of their favorite teachers or their friends.For example,a group of boys may dress up and imitate a group of their friends.It is all light-hearted.
The“Senior Show”is usually a part of Senior Week,which is a week specifically dedicated(专用的) to seniors.During this week,seniors usually get academic or athletic awards they have won over their high school careers.The seniors also vote for one of their male and female classmates who they believe is the best-looking or funniest or most involved,etc.These are then published in the yearbook.
The yearbook is an important part of high school for seniors.It is usually dedicated to them and has all their pictures and some words from them in it.Then seniors go around and get it signed by their friends so they can always remember their time together.
Of course during all of this time,seniors are preparing for the Senior Prom,which is an important moment in American culture.It is the most important dance in a young American’s life.
The end of senior year is a truly special and wonderful time for American students.It’s something they will remember for the rest of their lives.
60.Which of the following is the closest in meaning to the underlined sentence in paragraph1?
A.For American high school seniors,things are quite different.
B.It doesn’t make difference at the end of the senior year.
C.For American high school seniors,it is the best time of the year.
D.It is the period filled with stress and workload.
61.What activities that seniors would like to do according to the passage?
A.School work B.Voting for the film star
C.Singing or dance contests D.Senior Show and Senior Prom
62.What will most probably be talked about in the next paragraph of the passage?
A.Activities on the sports field
B.The graduation ceremony where they receive their high school diploma
C.Their favorite film stars
D.The health of seniors

第三部分：阅读理解（共15小题，每题2分，满分30分）
阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。
Joanne was stuck in traffic jam in central Birmingham at 5:30.and at 6:30 she was expected to be chairing a meeting of the tennis club.At last.the traffic was moving.She swung quickly racing to her house.As she opened the door,she nearly tripped over Sheba.
“Hey,Sheba.”she said,“I’ve got no time for you now,but I’ll take you out as soon as I get back from tennis club.”Then she noticed Sheba seemed to be coughing or choking Obviously,she could hardly breathe.Immediately,Joanne realized she would have to take her to the vet（兽医）.When she got there,that vet was just about to close for the day Seeing the state of Sheba,Dr.Sterne brought her quickly into his office.
“Listen,doctor,I’m really in a rush to get to a meeting can I leave her with you,and go and get changed?I’ll be back in ten minutes to pick her up,and then I’ll take her on to the meeting with me.Is that OK?”
“Sure.”said the doctor.
Joanne made the quick trip back to her house in a couple of minutes.As she was once more entering the hallway,the phone by the door began to ring.
“This is Dr.Sterne,”said an anxious vioce,“I want you to get out of that house immediately,”said the doctor’s voice.“I’m coming round fight away,and the police will be there any time now.Wait outside!”
At that moment,a police car screeched to a stop outside the house.Two policemen got out and
rain into the house.Joanne was by now completely confused and very frightened.Then the doctor arrived.
“Where’s Sheba?Is she OK?”shouted Joanne.
“She’s fine,Joanne.I took out the thing which was choking her,and she’s OK now.”
Just then,the two policemen reappeared from the house,half-carrying a white-faced man,who could hardly walk.There was blood all over him.
“My God,”said Joanne,“how did he get in there?And how did you know he was there?”
“I think he must be a burglar.”said the doctor.“I knew he was there because when I finally removed what was stuck in Sheba’throat:it turned out to be there human fingers”
56.What was Joanne supposed to do at 6:30?
A.To walk her dog B.To see her doctor
C.To attend a club meeting D.To play tennis with her friends
57.Joanne wanted to get back to her home again
A.to dress up for the meeting B.to phone the police station
C.to catch the badly hurt burglar D.to wait for her dog to be cured
58.From the passage,we can infer that
A.Sheba fought against the burglar
B.the police found the burglar had broken in
C.Joanne had planned to take her dog to the meeting
D.the doctor performed a difficult operation on the dog
59.In the passage,the writer intends to tell us that the dog is
A.clever B.friendly C.frightening D.devoted