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（廢渣填埋場）, 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.

Move Earth—it’s no science fiction
LONDON-Scientists have found an unusual way to prevent our planet from overheating: move it to a cooler spot. All you have to do is send a few comets（彗星）in the direction of Earth, and its orbit will be changed. Our world will then be sent spinning into a safer, colder part of the solar system.
This idea for improving our climate comes from a group of US National Aeronautics and Space Administration（NASA） engineers and American astronomers. They say their plan could add another six billion years to the useful lifetime of our planet—effectively doubling its working life.
The plan put forward by Dr Laughlin, and his colleagues Don Korycansky and Fred Adams
,needs carefully directing a comet or asteroid so that it passes close by our planet and sends some of its gravitational energy to Earth.
“Earth’s orbital speed would increase as a result and we would move to a higher orbit away from the Sun,”Laughlin said.
Engineers would then direct their comet so that it passed close to Jupiter or Saturn. The comet would pick up energy from one of these giant planets. Later its orbit would bring it back to Earth, and the process would be repeated.
In the short term, the plan provides an ideal way to global warming, although the team was actually concerned with a much greater danger. The sun is certain to heat up in about a billion years and so “seriously compromise” our biosphere（生物圈）—by cooking us.
That’s why the group decided to try to save Earth.
The plan has one or two worrying aspects, however. For a start, space engineers would have to be very careful about how they directed their asteroid or comet towards Earth. The smallest miscalculation（誤算）in orbit could fire it straight at Earth—with deadly consequences.
There is also the question of the Moon. As the current issue of Scientific American magazine points out, if Earth was pushed out of its current position it is “most likely the Moon would be stripped away from Earth,” it states. This would greatly change our planet’s climate.
1. What makes the scientists plan to move Earth?
A. A few comets are moving to the direction of Earth.
B. Earth’s working life is coming to an end soon.
C. Earth will become too hot for mankind to keep alive.
D. The moon is moving farther and farther away from Earth.
2.If the plan is successful, Earth will have a working life of ______years.
A.12 billion                  B.6 billion                    C.18 billion                  D.24 billion
3.What serious problems might the plan cause according to the passage?
A. The comet might hit Earth and man might lose the moon.
B. Earth might be moved too far away and man might be frozen to death.
C. The comet might hit Jupiter or Saturn and never return to Earth.
D. Earth’s working life might be greatly shortened.
4.What does the underlined word “compromise” mean?
A. provide                    B. benefit              C. share     D. endanger
5.Which of the following best shows how the plan would work?

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McGill Comedy Club Important meeting today. Discussions on putting on Blazing Saddles. Union room 302, 3-4 pm. New members (both actors and non?actors, living and dead) are welcome.	History Students' Association Prof. Michael Cross of Dalhousie University will be speaking on “Unskilled Labours on Rivers and Canals in Upper Canada, 1820-1850: The Beginnings of Class Struggle,"at 10 am in Leacock 230.	Design Mirror Sale All types and sizes of design mirrors priced to please. Sale today in Union room 108.
McGill Teaching Assistants' Association A general meeting, for all the TAs, will be held at 4 pm in Leacock 116.	Women's Union Important. General Meeting at 6 pm, Union room 423. Speaker on “Importance of d eciding basic goals of the Women's Union".Everyone, old, new and those ?intere sted,? please attend.
Film Society Last meeting of the term for all members.All managers are required to be present. 6:00 sharp, Union room 434.	Canadian University Students Overseas CUSO presents “Guess Who's Coming to Breakfast" at 7 pm. Newman Centre, 3484 Peel. Find out about CUSO here and overseas. Everyone welcome.

1.Where can you probably find this text?
A. In a school magazine.          B. In a national paper.
C. In a guide book.              D. In a university daily newspaper. 
2.If you are interested in arts, where would you go for a visit?
A. Leacock 116.                   B. Union room 423.
C. Union room 108.                D. Newman Centre, 3484 Peel. 
3.Which of the following is the name of a play?
A. Blazing Saddles.
B. Guess Who's Coming to Breakfast.
C. Importance of deciding basic goals of the Women's Union.
D. Unskilled Labours on Rivers and Canals in Upper Canada, 1820-1850. 

If you dream of going someplace warm to escape the cold winter weather,a trip to a recently discovered planet would certainly warm you right up.The planet,named
OGLE-TR-56b,has temperatures of more than 3,000°F.“This is the hottest planet we know about,”says Dr Dimitar Sasselov,a scientist who led the discovery team.“It is hot enough to have an iron fog and to rain hot iron droplets(細沫).”
The new planet is 30 times farther away than any planet discovered by scientists
before.It is in the Milky Way(銀河)but it is not in our solar(太陽的)system.The new planet moves around a star much like our sun,however scientists discovered the planet by using a new planet?searching method called transit technique.They were able to catch sight of the planet when it moved in front of its star,causing the star's light to dim(變暗).Scientists compare the method to discovering the shadow of a bee flying in front of a searchlight 200 miles away.“We believe the door has been opened wide to go and discover planets like the Earth,”says Sasselov.
1.We can infer from the passage that_________.
A.there is iron on the new planet
B.we could go to the new planet in winter
C.the star could block our view of the new planet
D.scientists are studying the weather
2.The “transit technique”can_____________.
A.help dim the light of a star
B.help scientists with a searchlight
C.help discover a bee on a planet
D.help find a planet moving before its star
3.Which is the best title for the passage?
A.New Planet searching Technique
B.New Distant Discovery
C.Space Searching
D.Dream Planet

There are three separate sources of danger in supplying energy by nuclear power(原子能).
First, the radioactive material must travel from its place of production to the power station. Although the power stations themselves are strongly built, the containers used for the transport of the materials are not. Normally, only two methods of transport are in use, namely road or rail. Unfortunately, both of these may have an effect on the general public, since they are sure to pass near, or even through, heavily populated areas.
Second, there is the problem of waste. All nuclear power stations produce wastes that in most cases will remain radioactive for thousands of years. It is impossible to make these wastes nonradioactive, and so they must be stored in one of the inconvenient ways that scientists have invented. For example, they may be buried under the ground, or dropped into deserted mines, or sunk in the sea. However, these methods do not solve the problem, since an earthquake could easily break the containers.
Third, there may occur the danger of a leak(泄漏) or an explosion at the power station. As with the other two dangers, this is not very likely, so it does not provide a serious objection to the nuclear program. However, it can happen.Separately, these three types of dangers are not a great cause for worry. Taken together, though, the probability of disaster(災(zāi)難) is extremely high.
1.Which of the following is FALSE?
A.It is possible that a leak or an explosion occurs at a power station.
B.It is unusual for radioactive materials to be transported across land.
C.The containers are likely to be broken by an earthquake.
D.Nuclear wastes remain dangerous in most cases for many years. 
2.The author thinks that the ways to store nuclear wastes are ________.
A.easy      B.impossible         C.reasonable        D.ineffective 
3.What do we learn from the last paragraph?
A.The power station is a safe place.
B.The dangers of nuclear energy can be prevented.
C.The general public are strongly against the nuclear program.
By itself, none of the three dangers is very likely to cause much worry.
4.What is this passage about?
A.Uses of nuclear power.          B.Dangers from nuclear power.        
C.Public anger at nuclear power.  D.Accidents caused by nuclear power. 

If there is no difference in general intelligence(智力)between boys and girls,what can explain girls' poor performance in science and mathematics?
It seems to be that their treatment at school is a direct cause.Mathematics and science are seen as subjects mainly for boys,and therefore ,as girls become tee
nagers,they are less likely to take them.Interestingly,both boys and girls often
regard the subjects for boys as more difficult.Yet it has been suggested that girls do not take mathematics courses ,not because they are difficult,but for social reasons.Girls do not want to be in open competition with boys because they are afraid to appear less feminine(女性的)and attractive.
However,if we examine the performance of boys and girls who have taken mathematics courses,there are still more high?achieving boys than there are girls.This difference appears to be world?wide.Biological explanations have been offered for this,but there are other explanations too.
Perhaps the difference which comes out during the teenage years has its roots in much earlier experiences.From their first days in kindergarten,boys are encouraged to work on their own and to complete tasks.Facts show that outstanding(杰出的)mathematicians and scientists have not had teachers who supplied answers.
Besides,there can be little doubt that teachers of mathematics and science expect their boy students to do better at these subjects than their girl students.They even appear to encourage the difference between boys and girls.They spend more time with the boy students ,giving them more time to answer questions and working harder to get correct answers from them.They are more likely to call on boys for answers and to allow them to take the lead in classroom discussion.They also praise boys more frequently.All of this seems to encourage boys to work harder in science and mathematics and to give them confidence(信心)that they are able to succeed.
Such a way of teaching is not likely to encourage girls to take many mathematics
and science courses,nor is it likely to support girls who do.When it comes to these subjects it seems certain that school widens the difference between boys and girls.
1.Girls are likely to think that____________.
A.science courses are for both boys and girls
B.science courses make them more popular
C.science courses make them successful        
D.science courses are difficult for them          
2.The text mainly discusses_____________reasons for the difference between boys and girls in scientific achievements. 
A.biological         B.historical          C.social       D.personal          
3.What are boys usually encouraged to do at school?
A.To get help with their homework.        
B.To play the leading role in class.        
C.To work with girl students in class.        
D.To learn to take care of others.          
4.What does the passage say about great mathematicians?        
A.Their teachers did not supply answers to them.        
B.They started learning mathematics at an earlier age.        
C.They showed mathematical abilities in their teenage years.
D.Their success resulted from their strong interest in mathematics.?
5.The author would probably agree that_____________.
A.boys and girls learn in the same way        
B.boys and girls are equal in general intelligence        
C.girls are more confident in themselves than before        
D.girls should take fewer science courses than boys          

Have you ever got stuck with unwanted courses or a class schedule that cannot be changed? If so, that's because you don't know how to select the perfect sch
edule. But by following a few simple steps, you can begin any term with the right courses at the most convenient times.
First, you must find the right courses. These are the ones that have the least amount of work, the fewest tests and the kindest professors. Ask your friends about courses in which they received A's after attending only 70 percent of the classes. Ask around, too, to see which instructors have given the same tests for the last fifteen years. Photocopies of these tests are usually cheap and can be easily found in school. Then, pick up a copy of the master schedule and study it carefully. Find the course titles that mean an easy pass for a painless subject.
Look for titles like “Arts and Crafts for Beginners” and “Rock Music of the 1950s”.
Next, when you have got lists of easy instructors and subjects, you can begin to select your time periods. If you stay up late in order to watch old movies, you may want a daily schedule that begins no sooner than noon. You should schedule only afternoon courses, too, if you're one of those people who hate to leave a warm bed in the morning. On the other hand, if you are a person who gets out of bed at dawn, you may want to get your classes out of the way as early as possible. That way you have the rest of the day free. Morning classes are also necessary if you are a soap opera(肥皂劇) fan.
Finally, you want your schedule to pass through registration successfully. The main way to do this is to register(注冊) early. If a course does happen to be closed because you simply couldn't register at 7:00 am, you may still be able to get in. Talk to the professor and tell him or her that a serious and hardworking student like yourself would be a shining example to other students. Be sure to carry a list of back-up courses to registration, though, just in case one of your chosen classes changes professors or time periods.
By following these suggestions, any student can pick the perfect class schedule. College can thus become an almost pleasant activity.
1.Which of the following statements is true?
A.You can get copies of tests if you are willing to pay the price.
B.“Rock Music of the 1950s” may be an easy course.
C.It is difficult to pick the perfect class schedule.
D.Attendance is required in all classes. 
2.You should  ________ .
A.register for classes in the morning if you get up early
B.have classes late in the morning if you stay up late
C.sign up for afternoon classes if you want to see soap operas 
D.choose classes in the evening if you want to watch old films 
3.If a course happens to be closed, you should  ________ .
A.register at 7:00 am               B.sit in on the class anyway
C.register for a back up course      D.get help from the professor 
4.Which of the following would be the best title for the passage?
A.Course Registration Made Easy         B.How to Find the Right Courses 
C.Classes and After?class Activities     D.How to Pick the Perfect Schedule

The science of physics today is as current as the morning newspaper. Indeed,as
a result of new advances in physics and their rapid application to inventions designed to satisfy man's wants, the world ?itself? has been changing rapidly. Space technology, industrial technology, and the technology of the home, the farm, the office, the bank, and the department store have all been revolutionized.
Clearly, every grown?up today would understand the world he lives in much better if he knew something about physics. Whether it be Congress(美國國會) voting huge sums of money for new ?warships,? space exploration, or atomic energy；the office staff learning to use a new computer；son Bobby wanting to know about going to the moon；or the housewife learning to operate a new electric stove physics seems to be everywhere.
Teachers in thousands of schoolrooms in America are trying to communicate some of the excitement and importance of these new developments to their students.
They know that some of their eager students will someday be scientists and will them selves then contribute(貢獻) to the development of new knowledge or its application to new things.
But in any case, they can be sure that if they bring a knowledge of science(any science) to their students in meaningful and stimulating ways, they have contributed much to helping each one live a more meaningful life.
1.The application of new advances in physics to inventions ________ .
A.may solve all the problems in teaching        
B.can help people understand the meaning of life        
C.is intended to meet people's needs        
D.makes people understand the voting rules of the Congress 
2.According to the passage, many American teachers are making efforts to do all of the following EXCEPT ________.
A.stimulating their students' curiosity in physics 
B.making their students understand the importance of physics 
C.giving their students the information of new advances in science 
D.creating excitement about physical education among their students   
3.The word “themselves” in the third paragraph refers to  ________ .
A.some of the eager students       B.the students in the classroom        
C.the teachers giving lessons      D.all the scientists in physics 
4.The first two paragraphs of the passage mainly tell us about ________ .
A.new advances in physics          B.the use of physics in our life        
C.the science of physics           D.modern developments in science 

About one million years ago,the Ice Age began.The Ice Age was a long period of time in which four great glaciers(冰川) pushed southward to cover almost all the upper half of North America,and then melted away.Each glacier was a thick sheet of ice and snow that spread out from a center near what is now Hudson Bay in Canada.The winters were long,and the cool summers were too short to melt much of the ice and snow.The ever?growing sheet built up to a thickness of two miles at its center.
As all glaciers do,these great glaciers slid(滑動). They pushed down giant trees in their paths and scraped(刮削)the earth bare(光禿禿)of soil.Many animals moved farther south to escape.Others stayed and were destroyed.
When winters of little snow came,the summer suns into the edges to the ice sheets.As the glaciers melted,rocks,soil and other things that had mixed with the ice and snow were left.New hills,lakes and rivers were formed.
The last of the great glaciers began its melting about 11 000 years ago.Itsmelting formed the Great Lakes.These lakes are today little changed from their early sizes the glaciers.This is the Mississippi Missouri Ohio system.These rivers were miles wide at first.Through the years they settle into their present channels.
The main idea of this passage is  ________ .
A.the Ice Age was a long period of time        
B.great glaciers covered North America many years ago        
C.changes in climate helped to melt the glaciers        
D.how glaciers changed North America       
2.The author states that all glaciers ________.
A.are two miles thick           B.form frozen lakes        
C.are a million years old      D.move and slide   
3.From the information in this passage we know that  ________.
A.glaciers are destructive        
B.all glaciers in the world move southward        
C.the Mississippi Missouri Ohio systems is larger than it was before the Ice Age        
D.the Great Lakes are now smaller than they were before the Ice Age
4.The Ice Age lasted almost ____.
A.1 000 years      B.100 years      C.1 000 000 years      D.11 000 years  
5.In the last sentence,the word “their” refers to  ________ .
A.lakes            B.rivers         C.glaciers             D.systems