56．Some scientists believe that most of the time birds’ singing is actually　　　 .

　　　 A．an expression of happiness　　　 B．a way of warning

　　　 C．an expression of anger　　 D．a way of greeting

75．What would be the best title for this text?

　　　　 A．Training Our Bodies　　　　　　　　　　　　　　　　　　　　 B．Physical Activities

C．Movement Training　　　　　　　　　　　　　　　　　　　　　 　　　D．Extra Body Effort

答案　 72.C　 73.B　 74.B　 75.A

Passage 80

(05·湖北A篇)

Have you ever wondered why birds sing? Maybe you thought that they were just happy .After all ,you probably sing or whistle when you are happy.

　　　 Some scientists believe that birds do sing some of the time just because they are happy .However ,they sing most of the time for a very different reason .Their singing is actually a warning to other birds to stay out of their territory.

　　　 Do you know what a “territory” is ?A territory is an area that an animal ,usually the male, claims(声称)as its own .Only he and his family are welcome there .No other families of the same species(物种)are welcome .Your yard and house are your territory where only your family and friends are welcome . If a stranger should enter your territory and threaten you ,you might shout .Probably this would be enough to frighten him away.

　　　 If so ,you have actually scared the stranger away without having to fight him .A bird does the same thing. But he expects an outsider almost any time ,especially at nesting(筑巢)season. So he is screaming all the time ,whether he can see an outsider or not .This screaming is what we call a bird’s song ,and it is usually enough to keep an outsider away.

　　　 Birds sing loudest in the spring when they are trying to attract a mate and warn others not to enter the territory of theirs.

　　　 You can see that birds have a language all their own .Most of it has to do with attracting mates and setting up territories.

74．The experiments done by some scientists showed that ________.

　　　　 A．some male patients were asked to ride bicycles regularly in the experiments

　　　　B．the physical exercise had more harmful effect on the hearts of the untrained patients

　　　　C．the physical exercise was harmless to the male patients with heart trouble

　　　　D．the physical exercise could be helpful for the patients to take in more oxygen

73．What must a dancer do before she can balance herself?

　　　　 A．She must dance on the point of her shoes.

　　　　 B．She must receive long-time training.

　　　　 C．She must turn around on one foot.

　　　　 D．She must perform again and again.

72．The first kind of physical activity must be strictly controlled because _________.

　　　　 A．a mistake in the wrong direction is dangerous to the fingers

　　　　 B．a wrong movement in a direction will cause no mistakes

　　　　 C．a movement in the wrong direction will cause a mistake

　　　　 D．a slight movement of a finger will lead to a mistake

59．From the passage, we can conclude that __________.

　　　 A．people will no longer consider building materials in the future

　　　　 B．energy-saving buildings will become more popular in the future

　　　　 C．almost all people will move into the houses heated by large rocks

　　　　 D．energy engineers will devote themselves only to modern technology

答案　 56.B　 57.A　 58.B　 59.B　

Passage 79

(05·辽宁E篇)

There are two kinds of physical activity which require special training. The first demands exact careful movements of the muscles(肌肉). This kind of activity must be strictly controlled because even a slight movement in the wrong direction will lead a mistake. To type quickly, for example, a person needs training; the slightest movement of a finger in the wrong direction may cause a spelling mistake. A dancer who has to dance on the point of her shoes or turn around on one foot must be trained for a long period of time before she can sense her own center and balance herself. You may have seen a girl walking on a rope across an empty space, which, too, requires a lot of practice.

The second kind of physical activity needs greater strength or extra effort. Most of us get tired if we try to run half a mile without stopping, but a specially-trained person can do this without much effort. Three years ago, some scientists carried out experiments, which produced meaningful and unexpected results. They wanted to find out whether a certain amount of physical exercise would injure those suffering from heart problems. They selected some male patients and trained them in continuous bicycle riding. They were surprised to find that the harmful effect of given amount of physical effort was actually less on the hearts of these trained patients than on those of the patients who were not similarly trained. This is important because it shows that regular physical exercise enables us to make better use of the oxygen(氧气)we breathe in and that this training, in fact, reduces the amount of work our hearts do. Many tasks which are hard for untrained people are not hard at all for trained people.

58．The underlined words “natural law” in the third paragraph refer to the fact that ________.

　　　 A．heat raises the temperature in the houses

　　　　B．heat goes in the upward direction

　　　　C．heat goes up if temperature is raised

　　　　D．heat increases the temperature of rocks

57．People in some areas gain a source of heat by _________.

　　　 A．keeping their livestock downstairs　　　　　　　　

　　　　 B．protecting their livestock from the cold

　　　　 C．sharing their houses only with their cows　　

　　　　 D．living on the second floor with their livestock

56．What did people begin to consider as electricity was no longer cheap?

　　　 A．The climate of their areas.　　　　　　　　　　　　　　　　

B．The energy for their houses.

　　　　C．The fashions for their houses.　　　　　　　　　　　　

D．The building materials for their houses.

67．The best title for this passage may probably be　　　　 .

　　　 A．Studies of the Amazon　　 B．Climates of the Amazon

　　　 C．Secrets of the Rainforests　　　 D．Changes of the Rainforests

答案　 64.B　 65.D　 66.C　 67.C

Passage 78

(05·辽宁A篇)

When building houses, people used to think about not only the climate of the areas but also the building materials and the fashions for their houses. However, since electricity became more and more expensive, people began to pay much more attention to the energy they could get for their houses and the new ways they could find to protect their houses from both cold and heat.

Now, houses of an old yet new type have been widely built. In some parts of the world, people share their houses with their livestock(家畜).During cold weather, they gather their cows, goats, or other animals and keep them on the first floor of their houses. The reasons are that the animals can be protected from the cold and that they can help to heat the houses as well. The body heat given off by the animals rises to the second floor of the houses, where people live. By sharing their houses with their livestock, people gain a source of heat.

People who live in or near cities do not usually keep livestock. However, home builders use the fact that heat rises. This natural law can be used in building houses in these areas. Instead of keeping livestock on the first floor, builders fill it with large rocks. As they are open to the sun’s rays during cold weather, these rocks take in heat. They also give off the heat, and, of course, the warm air rises into the living areas of the houses. So these houses are energy-saving.

House-building becomes a great challenge(挑战)to building designers and energy engineers. They try to meet this challenge by learning from old traditions and by using modern technology. And someday in the future, people will be able to live in more energy-saving houses.