Besides giving off gases and dusts into the air, humans produce waste that is poured on the environment. Often, this waste produced by major industries and people is harmful to both nature and human life.

One of the main causes of the large amount of dangerous waste is that people do not realize how large a problem it is. Because it can be simply removed and sent to a landfill(废渣填埋场),the problem is often believed to end there. In addition, industries have often shown an unwillingness to find ways to deal with dangerous waste because of the related expenses. Many industries and governments build simple landfills to store waste, and often just pour waste chemicals into nearby bodies of water. Often, chemicals used for industrial production cause dangerous forms of waste.The amount of these chemicals has increased greatly in the past, but it is often difficult and expensive to get rid of these chemicals or to store them in a way safe to human life and the environment.

Every year, major health problems result from dangerous waste. Sadly, it is often only after someone has died or become seriously ill that governments will take measures to reduce levels of harmful waste.

Some governments have realized how serious the dangerous waste problem is and are now trying to settle this problem. They are also trying to limit the amount of waste industries are allowed to produce.

Not only governments but ordinary people as well must work together to solve the problem. They can choose not to buy those products which require the production of dangerous waste, and produce less harmful waste themselves. Many scientists think that waste production can be cut. The waste can be reduced by at least one third using existing technologies and methods.

72. What would be the best title for the text?

A. Measures of Reducing Dangerous Waste B. Danger of Harmful Waste to Mankind

C. Dangerous Waste and Water Pollution　　　 D. Environmental Protection

73.According to the text, people　　　 .

A. do not produce harmful waste in their daily life

B. do not know where to place the dangerous waste

C. are not clear about how serious the dangerous waste problem is

D. are not sure about where harmful waste ends

74.What troubles industries most in dealing with the dangerous waste problem?

A. How to get government support.　　　　　 B. How to increase their production.

C. How to store harmful waste.　　　　　　　　 D. How to cut down the related costs.

75. What can be inferred from the passage?

A. The polluting industries are not allowed to sell their products.

B. Present technologies have settled the harmful waste problem.

C. Everyone should obey the government rules for the problem.

D. To solve the problem requires the efforts of the whole society.

Have you ever had the strange feeling that you were being watched? You turned around and ,sure enough, someone was looking right at you!

Parapsychologists(灵学家)say that humans have a natural ability to sense when someone is looking at them. To research whether such a “sixth sense”really exists, Robert Baker, a psychologist(心理学家)at the University of Kentucky, performed two experiments.

In the first one, Baker sat behind unknowing people in public places and stared at the backs of their heads for 5 to 15 minutes. The subjects（受试者）were eating, drinking, readingstudying, watching TV, or working at a computer. Baker made sure that the people could not tell that he was sitting behind them during those periods. Later, when he questioned the subjects, almost all of them said they had no sense that someone was staring at them.

For the second experiment, Baker told the subjects that they would be stared at from time to time from behind a two way mirror in a laboratory setting. The people had to write down when they felt they were being stared at and when they weren’t. Baker found that the subjects were no better at telling when they were stared at and when they weren’t.Baker found that the subjects were no better at telling when they were started at than if they had just guessed.

Baker concludes that people do not have the ability to sense when they’re being stared at.If people doubt the outcome of his two experiments, said Baker, “I suggest they repeat the experiments and see for themselves.”

68. The purpose of the two experiments is to 　　　 .

A. explain when eople can have a sixth sense

B. show how people act while being watched in the lab

C. study whether humans can sense when they are stared at

D. prove why humans have a sixth sense

69.In the first experiment, the subjects　　　 .

A. were not told that they would be stared at　

B. lost their sense when they were stared at

C. were not sure when they would be stared at　

D. were uncomfortable when they were stared at

70.The underlined word “outcome” in the last paragraph most probably means　　 .

A. valu　　　　　　　　　　 B. result　　　　　　　　 C. performance　　　　　 D. connection

71. What can be learned from the passage?

A. People are born with a sixth sense.　　

B. The experiments support parapsychologists’idea.

C. The subjects do not have a sixth sense in the experiments.

D. People have a sixth sence in public places.

_________ it rain tomorrow, we would have to put off the visit to the Yang pu Bridge.
A．Were B．Should  C．Would　　D．Will

On the wall ___________ two large portraits.
A．hangs 　B．hang  C．hanged　　　D．are hanging

Only when ________ the painting _________ decide whether the painting is worth buying.　
A．the sees; he can  B．does he see; can he C．he sees; can he  D．sees he; he can

____ there no gravity, there would be no human beings on the earth.
A．If 　B．If was  C．If not　　D．Were

Albert Einstein cared little for money. ___________ Professor Wang.　
A．Either did   B．So was   C．So did　　D．Neither did

Such _________ the results of the experiments.
A．is  B．was   C．are　　D．as be

_________ , she was very brave.
A．Girl as she was B．As she was a girlC．A girl as she was　D．Girl as was she

_________ about the universe up till now.　
A．We know quite a lotB．Only little we have known
C．Very little have we knownD．So much we do know