听力题Wheredidthemanfindthebag?

听力题Columbus sailed from Spain in September 1492

听力题W: We''ve got a new manager in our department

听力题 Scientists have discovered that plants themselves produce many poisonous chemicals for defense against insects. But insects have developed ways of dealing with them and, in fact, have been eating plants for about 250 million years. Now insects are using these same mechanisms to deal with man-made poisons—insecticides. This is why resistance of insects to insecticides has developed so rapidly. What should be done? Scientists studying the problem suggest that farmers use less insecticides. At the moment, farmers regularly spray crops as a precaution against problems that are caused by large numbers of pests. They should, instead, spray only where pests have actually been seen. Secondly , farmers could use a combination of two or three insecticides at once. To survive, the insects would need to become resistant to two or more insecticides at the same time. The most surprising suggestion, perhaps, is that at certain times of the year, farmers should actually try to attract insects onto the crops they are trying to protect. The new insects will mate with those which survived from a certain kind of insecticide and will lessen the latter''s resistance to it. Scientists hope that these and other measures will postpone the saying when farmers and scientists will have to stand by while new super-bugs which may be resistant to all poisons invade our farms and devour our crops. Scientists have discovered that plants themselves produce many poisonous chemicals for defense against insects. But insects have developed ways of dealing with them and, in fact, have been eating plants for about 250 million years. Now insects are using these same mechanisms to deal with man-made poisons—insecticides. This is why resistance of insects to insecticides has developed so rapidly. What should be done? Scientists studying the problem suggest that farmers use less insecticides. At the moment, farmers regularly spray crops as a precaution against problems that are caused by large numbers of pests. They should, instead, spray only where pests have actually been seen. Secondly , farmers could use a combination of two or three insecticides at once. To survive, the insects would need to become resistant to two or more insecticides at the same time. The most surprising suggestion, perhaps, is that at certain times of the year, farmers should actually try to attract insects onto the crops they are trying to protect. The new insects will mate with those which survived from a certain kind of insecticide and will lessen the latter''s resistance to it. Scientists hope that these and other measures will postpone the saying when farmers and scientists will have to stand by while new super-bugs which may be resistant to all poisons invade our farms and devour our crops.

听力题WhathasGeorgesuggested?

听力题Whendoestheconversationtakeplace?

听力题Howdoesthemanrespondwhenthewomandecidestheyshouldgoonadiet?

听力题Whatsalarydoesthecompanypaythefirstyear?

听力题Whydidthemanlookpale?

听力题M: Could you tell me where our library is

听力题 Some people dream of being president of the United States, some of becoming hot in a Hollywood movie, and others of making millions of dollars overnight. But, could a dream like that come true in real life? Well, it did happen to Peter Johnson. Peter was an auto mechanic. One day, he walked into the Union Trust Bank in Baltimore and took 5 ,000 dollars that did not belong to him. The guards and other employees stood back and let him stuff the bills in his shirt and pants, without trying to prevent him from taking the money. No one tripped the alarm. No one pulled a gun. No one called the police. Why did they allow him to get away with it? Well, everything was legal. Peter had own a contest promoted by a Baltimore radio station. The first prize entitled him to enter the Union Trust Bank and gather up as much money as he could lay his hands within five minutes. Because he could not bring any large bags or boxes into the bank, all the money had to be placed on his pockets. As the time went by, Peter ran about wildly, turning to pick up many large bills as he could find. When his time was up, he was out of breath, but was $5,000 richer. Some people dream of being president of the United States, some of becoming hot in a Hollywood movie, and others of making millions of dollars overnight. But, could a dream like that come true in real life? Well, it did happen to Peter Johnson. Peter was an auto mechanic. One day, he walked into the Union Trust Bank in Baltimore and took 5 ,000 dollars that did not belong to him. The guards and other employees stood back and let him stuff the bills in his shirt and pants, without trying to prevent him from taking the money. No one tripped the alarm. No one pulled a gun. No one called the police. Why did they allow him to get away with it? Well, everything was legal. Peter had own a contest promoted by a Baltimore radio station. The first prize entitled him to enter the Union Trust Bank and gather up as much money as he could lay his hands within five minutes. Because he could not bring any large bags or boxes into the bank, all the money had to be placed on his pockets. As the time went by, Peter ran about wildly, turning to pick up many large bills as he could find. When his time was up, he was out of breath, but was $5,000 richer.

听力题M: Excuse me. Have you been waiting long

听力题W: Oh! I am glad to see you

听力题Howwouldthewomangohome?

听力题W: Next! Good morning, can I help you

听力题Whatdoesthemanwanttodo?

听力题M: Could you tell me where our library is

听力题M: Hello, Jane. Where are you going

听力题W: Did you have a good time today? M: Oh, no

听力题W: Good afternoon, sir