Recently, some concerns have been raised about the health of the world's banana plants. Many media reports have said that bananas may completely disappear in the coming ten years.

Bananas are one of the world's most important food crops. They are also the fourth most valuable export. Bananas do not grow from seeds. Instead, they grow from existing plants. Bananas are threatened by disease because all the plants on a farm are copies of each other. They all share the same genetic weaknesses.

For example, the Cavendish banana is most popular in American markets. It is an important export crop. However, some kinds of fungus (真菌) organisms easily infect the Cavendish. Black Sigatoka disease affects the leaves of Cavendish banana plants. The disease is controlled on large farms by putting chemicals on the plant's leaves. Farmers put anti-fungal chemicals on their crops up to once a week.

Another fungal disease is more serious. Panama disease attacks the roots of the banana plant. There is no chemical treatment for this disease. Infected plants must be destroyed. Panama disease has affected crops in Southeast Asia, Australia and South Africa. There is concern that it may spread to bananas grown in the Americas. This could threaten an important export product for Central and South America.

The International Network for the Improvement of Banana and Plantain, whose headquarter lies in France, supports research on bananas. The group says that more research must be done to develop improved kinds of bananas.

The group says that fungal diseases mainly affect only one kind of banana. In fact, there are five-hundred different kinds of bananas. The United Nations Food and Agriculture Organization says the Cavendish banana represents only ten percent of world production.

The UN agency says farmers should grow different kinds of bananas. This protects against diseases that affect only one kind. Experts warn that disease may cause the Cavendish banana to disappear. This has already happened to one popular banana because of its genetic weakness against disease. (words: 335)

1.What does the passage mainly tell us?

A．Bananas are the world’s most important food crops.

B．There are five hundred different kinds of bananas.

C．The risk to a popular banana shows need to grow other kinds.

D．How to grow bananas in different countries.

2.Bananas are threatened by diseases because ___­­­­­­_______.

A．they have genetic weaknesses against disease.

B．they are one of the most valuable exports.

C．the only way to prevent it is to put chemicals on their leaves.

D．they grow from the seed

3.Panama disease__________.

A．doesn’t belong to fungal disease.

B．has spread to bananas in the world.

C．affects the leaves of banana plants.

D．destroys the bananas more seriously than Black Sigatoka disease.

4.We can infer from Paragraph 6 that ____________.

A．the center of the group is in the US.

B．the key to solving the disease is to research all kinds of bananas.

C．the Cavendish banana covers only a small part of the output of bananas.

D．each fungal disease affects five hundred different kinds of bananas.

5.According to the passage, which information is right?

A．The Cavendish banana can be mainly imported from North America and Europe.

B．Fungal diseases mainly affect the Cavendish banana.

C．The Cavendish banana won’t die out in the future.

D．Panama disease affects the leaves of banana plants.

 

The research is so designed that once _____ nothing can be done to change it.?

　A. begins  B. having begun  C. beginning  D. begun

In the 1960s,medical researchers Thomas Holmes and Richard Rahe developed a checklist of stressful events. They found out that any major change can be stressful. Negative events like “serious illness of a family member” were high on the list, but so were some positive life-changing events, like marriage. When you take the Holmes-Rahe test you must remember that the score does not show how you deal with stress—it only shows how much you have to deal with. And we now know that the way you deal with these events has a great effect on your chances of staying healthy.

By the early 1970s,hundreds of similar studies had followed Holmes and Rahe. And millions of Americans who work and live under stress worried over the reports. Somehow, the research got boiled down to a memorable message. Women's magazines ran headlines like “Stress causes illnesses”.If you want to stay physically and mentally healthy, the articles said, avoid stressful events. But such simplistic advice is impossible to follow. ven if stressful events are dangerous, many—like the death of a loved one—are impossible to avoid. Moreover, any warning to avoid all stressful events is a prescription(处方) for staying away from opportunities as well as trouble. Since any change can be stressful, a person who wanted to be ?completely? free of stress would never marry, have a child, take a new job or move.?

The idea that all stress makes you sick also takes no notice of what we know about people. It is supposed that we're all weak and passive in the face of difficulty. But many come through periods of stress with more physical and mental strength than they had before. We also know that a long time without change or challenge can lead to boredom, and physical and mental damage.?

The result of Holmes-Rahe's medical research tells us _______.?

A. the way of dealing with major events may cause stress?

B. what should be done to avoid stress?

C. what kind of event would cause stress?

D. how to deal with sudden changes in life?

The studies on stress in the early 1970's led to_______.?

A. widespread worry over its harmful effects?

B. great fear about the mental problems it could cause?

C. a deep research into illnesses connected with stress?

D. popular avoidance of stressful jobs?

According to the passage people who have experienced ups and downs may become_______.

A. discouraged when faced with difficulty

B. physically and mentally weak?

C. more experienced in the face of difficulty

D. uninterested in what happens to them?

What's the purpose of writing the text??

A. To tell people the discoveries about stress.?

B. To tell people how to keep healthy.?

C. To help people avoid stressful events.?

D. To help people view stress properly.

下面短文中有10处语言错误。请在有错误的地方增加、删除或修改某个单词。
增加：在缺词处加一个漏字符号（∧），并在其下面写上该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写上修改后的词。
注意：1.每处错误及其修改均仅限一词；
2.只允许修改10处，多者（从第11处起）不计分。

例如： It was very nice to get your invitation to spend ∧ weekend with you. Luckily I was the                        am completely free then, so I’ll to say “yes”. I’ll arrive in Bristol at around 8p.m. in Friday on evening.

 
Looking at the map of the world, and we can see that three quarters of the earth are covered by water. However, we are short of water, it sounds strange to you. But it is true. You see, 97% of the total water in the world is sea water, which is so salt that man can drink it. So only 3% of the water can be drunk or used for man. And the drinkable water comes from rivers, lakes and underground. Man even can’t use them completely, because the water contains icebergs and glaciers. All what is the worst is that water in some parts has been polluted or is being polluted. How can we drink? So something must be done to protect water from polluted.

In recent years many countries of the world have been faced with the problem of how to make their workers more productive. Some experts say the ___1___ is to make jobs more varied(多样的). But do more varied jobs ___2___ greater productivity? There is evidence to suggest that ___3___variety certainly makes the worker’s life more enjoyable, it doesn’t ___4___ make him work harder. As far as increasing productivity is concerned, then, ___5___ is not an important factor.

Other experts feel that giving the worker___6___ to do his job in his own way is important, and there is no doubt that this is true. The ___7___ is that this kind of freedom can’t easily be given in the modern factory with its complicated(复杂的) machinery which must be used in a ___8___ way. Thus while freedom of choice may be important, there is usually very little that can be done to ___9___ it.

Another important ___10___ is how much each worker ___11___ to the product he is making. In most factories the worker ___12___ only one small part of the product. Some car factories are now ___13___ with having many small production lines rather than one large one, so that each worker contributes more to the production of the cars on his___14___. It would seem that not only is degree of worker contribution an important factor ___15___ it is one we can do something about.

To what___16___ does more money lead to greater productivity? The workers themselves certainly think this is ___17___. But perhaps they want more money only because the work they do is so boring. ___18___ just lets them enjoy their spare time more. A ___19___ argument may explain demands for shorter working hours. Perhaps if we ___20___ making their jobs more interesting, they will neither want more money, nor will shorter working hours be so important to them.

1. A. answer   B. course C. attempt      D. system

2. A. run across      B. lead to       C. result from D. pick up

3. A. because  B. as       C. while  D. as though

4. A. mentally B. physically   C. carefully    D. actually

5. A. variety   B. relaxation C. creativity    D. machinery

6. A. judgement     B. freedom     C. direction    D. comfort

7. A. secret     B. skill    C. problem     D. strength

8. A. amusing B. dull    C. changeable D. fixed

9. A. use  B. create  C. supply D. fear

10. A. measure       B. invention    C. consideration     D. work

11. A. lies       B. sticks  C. objects       D. contributes

12. A. likes     B. equips C. transports   D. sees

13. A. tired     B. pleased       C. worrying       D. experimenting

14. A. own     B. will    C. line     D. hand

15. A. but       B. and     C. so       D. however

16. A. extent   B. quality       C. store   D. difference

17. A. natural  B. important   C. worrying    D. unbelievable

18. A. Rest     B. Sports C. Money       D. Playing

19. A. complete      B. friendly      C. given  D. similar

20. A. advise   B. succeed in  C. object to     D. are tried of