Part I Reading Comprehension (30%)
16、阅读下文，回答16-30题
Long bus rides are like television shows. They have a beginning, a middle, and an end—with commercials thrown in every three or four minutes. The commercials are unavoidable. They happen whether you want them or not. Every couple of minutes a billboard glides by outside the bus win-dow. "Buy Super Clean Toothpaste. "" Drink Root Beer. " "Fill up with Pacific Gas. " Only if you sleep, which is equal to turning the television set off, are you spared the unending cry of "You Need It! Buy It Now.! "
The beginning of the ride is comfortable and somewhat exciting, even if you' ve traveled that way before. Usually some things have changed--new houses, new buildings, sometimes even a new road. (76) The bus driver has a style of driving and it' s fun to try to figure it out the first hour or so. If the driver is particularly reckless or daring, the ride can be as thrilling as a suspense story.
Will the driver pass the truck in time? Will the driver move into the right or the left-hand lane? Af-ter a while, of course, the excitement dies down. Sleeping for a while helps pass the middle hours of the ride. Food always makes bus rides more interesting. But you' ve got to be careful of what kind of food you eat. Too much salty food can make you very thirsty between stops.
The end of the ride is somewhat like the beginning. You know it will soon be over and there ' s a kind of expectation and excitement in that. The seat, of course, has become harder as the hours have passed. (77)By now you' ve sat with your legs crossed, with your hands in your lap, with your hands on the armrests--even with your hands crossed behind your head. The end comes just at the right time. There are just no more ways to sit.

According to the passage, what do the passengers usually see when they are on a long bus trip?
A．Buses on the road.
B．Films on television.
C．Advertisements on the board.
D．Gas stations.


17、 What is the purpose of this passage?
A．To give the writer' s opinion about long bus trips.
B．To persuade you to take a long bus trip.
C．To explain how bus trips and television shows differ.
D．To describe the billboards along the road.


18、
The writer of this passage would probably be in favor of__________.
A．bus drivers who weren' t reckless
B．driving alone
C．a television set on the bus
D．no billboards along the road


19、
The writer feels long bus rides are like TV shows because__________.
A．the commercials both on TV shows and on billboards along the road are fun
B．they both have a beginning, a middle, and an end, with commercials in every three or four minutes
C．the drivers are always reckless on TV shows just as they are on buses
D．both traveling and watching TV are not exciting


20、
The writer thinks that the end of the ride is somewhat like the beginning because both are__________.
A．exciting
B．comfortable
C．tiring
D．boring

21、阅读下文，回答21-35题
All the useful energy at the surface of the earth comes from the activity of the sun. The sun heats and feeds creatures and mankind. Each year it provides men with two hundred million tons of grain and nearly ten million tons of wood, coal, oil, natural gas, and all other fuels are stored en-ergy from the sun. (80) Some was collected by this season' s plants as carbon compounds. Some was stored by plants and trees ages ago. Even waterpower derives from the sun. Water turned into vapor by the sun fails as rain. It courses down the mountains and is converted to electric power.
Light transmits only the energy that comes from the sun' s outer layer, and much of this energy that is directed towards the earth never arrives. About nine tenths of it is absorbed by the atmosphere of the earth. In fact, the earth itself gets only one half millionth of the sun' s entire output of radiant energy.

The sun is the source of all of the following EXCEPT__________.
A．gasoline
B．natural gas
C．atomic power
D．animal fat


22、 Radiant energy is stored as carbon compounds by__________.
A．plants
B．water
C．rock
D．creatures


23、 The sun' s energy provides us with all EXCEPT__________.
A．rain
B．teal
C．water
D．light


24、The largest part of the light energy directed towards the earth is__________.
A．stored up by the plants
B．absorbed by the earth' s atmosphere
C．stored up by the animals in the form of body fat
D．used for electric power

25、 Of the sun' s total output of radiant energy, the earth receives__________.
A．one tenth
B．one millionth
C．all that comes from the surface of the sun
D．a very small portion


26、阅读下文，回答26-40题
Trees are useful to man in three important ways: they provide him with wood and other prod-ucts; they give him shade; and they help to prevent droughts and floods.
Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important. (78)In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without ,them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear.
This does not only mean that man will have fewer trees. The results are even more serious:for where there are trees, their roots break up soil--allowing the rain to sink in--and also bind the soil, thus preventing it from being washed away easily; but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When all the top-soil is gone, nothing remains but worthless desert.
Two thousand years ago a rich and powerful country cut down its trees to build warships, with which to gain itself an empire. It set up the empire but, without its trees, its soil became poor and it grew weak. When the empire fell to pieces, the home country found itself faced with floods and starvation.

What is the most important service of trees to man according to the passage?
A．They help him make money.
B．They give him wood and other products.
C．They help him prevent droughts and floods.
D．They give him shade.


27、 Why do forests in many parts of the world slowly disappear?
A．New trees are not looked after properly.
B．Many trees have been cut down by man.
C．Man has not paid enough attention to planting trees.~
D．All of the above.


28、 Why did the country mentioned in the passage suffer from floods and starvation?
A．Because an empire was set up.
B．Because the empire fell to pieces.
C．Because it lost its trees.
D．Because too much had been spent on wars.


29、 Why does land become desert after all trees are cut down?
A．Because nothing remains on land except floods.
B．Because there are no longer trees to keep the rain and protect the top-soil.
C．Because too much rain sinks in and washes away the top-soil.
D．Because roots of the trees break up the soil.


30、 What does the author tell us in this passage?
A．How trees help prevent droughts and floods.
B．The relationship between trees and man.
C．How an empire fell to pieces in ancient times.
D．A story of trees.

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