Today, working less than a 40-hour week, people enjoy more leisure time. Hence, the wise use of leisure time has become an important problem for everyone, young or old. It is a particularly difficult problem for the sick, the aged, and those who have retired from earning a living. Those people have so much leisure that it is hard for them to find interesting and worthwhile ways to use it.How to spend leisure time wisely is not a particularly difficult problem for people ______.
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1 .Organisms have a great variety of ways of adapting. They may adapt in their structure, function and genetics, in their development and production of the young and in other respects. An organism may create its own environment, as do warm-blooded mammals, which have the ability to adjust body heat exactly to maintain their ideal temperature despite changing weather. Usually adaptations are an advantage, but sometimes an organism is so well adapted to a particular environment that, if conditions change, it finds it difficult or impossible to readapt to the new conditions.The author cites the behavio r of warm-blooded mammals in order to show that a living thing may have the ability______.
A to create an environment of its own B to remain still when an enemy is near C to make food from inorganic chemicals D to change the color of its skin
2 .Decibels（分贝）measured in water are different from those measured on land. A noise of one hundred-twenty decibels on land causes pain to human ears. In water, a decibel level of one-hundred ninety-five would have the same effect.Which of the following is discussed in the paragraph?
A The same noise level produces a different effect on land and in the ocean. B Different places may have different types of noises. C The decibel is not a suitable unit for measuring underwater noise. D Different ocean animals may have different reactions to noises.
3 .Many researchers，whose work depends on ocean sounds object to a limit of one-hundred-twenty decibels（分贝）. They say such a limit is a greater danger than they believed. They want to prevent noises from harming creatures in the ocean.According to the passage, what will scientists most probably do in the future?
A They will work hard to reduce ocean noise pollution. B They will protect animals from harmful noises. C They will try to set a limit of 120 decibels. D They will study the effect of ocean noise pollution.
4 .In a special report on cancer and blacks, the organization said blacks are usually diagnosed with cancer later than whites, and they are more likely to die of the disease.Which may NOT be a reason for higher cancer death rates among US blacks?
A Unequal access to medical care. B Greater probability of having other diseases. C Differences in the biology of the cancer. D Early diagnosis.
5 .In this world of change and complexity, the need for information is of greatest importance. Those people who have accurate, reliable up-to-date information to solve the day-to-day problems, the critical problems of their business, social and family life, will survive and succeed "Knowledge is power" may well be the truest saying and access to information may be the most critical requirement of all people.We can learn from the paragraph that _______.
A it is necessary to obtain as much knowledge as possible B people should make the best use of the information accessible C we should realize the importance of accumulating information D it is of vital importance to acquire needed information efficiently
7 .We are so used to our life on the surface of the earth that it can be quite an effort for our mind to break free of all the ideas that we take for granted. Because we can feel that things are heavy, we think of "weight" as being a fixed quality in an object, but it is not really fixed at all. If you could take a one-pound packet of butter 4, 000 miles out from the earth, it would weigh only a quarter of a pound.We find it hard to break free from ideas connected with living on the earth because_____
A it demands too great an effort for us to do so. B we are too familiar with the way things are to question the ideas. C we have proved that those ideas are correct. D we are so sure of ourselves that we never doubt anything on the earth.
8 .The children don’t just plan any city. They map and analyze（分析） the housing，energy，and transportation requirements of their own district and foretell its needs in 100 years. With the aid of an architect（建筑师） who visits the classroom once a week，they invent new ways to meet these needs and build models of their creations.“Designing buildings of the future gives children a lot of freedom，”says the teacher who developed this program.“They are able to use their own rich imagination and inventions without fear of blame，because there are no wrong answers in a future context. In fact，as the class enters the final model-building stage of the program，an elected ‘official’ and ‘planning group’ make all the design decisions for the model city，and the teacher steps back and becomes an adviser.”An architect pays a weekly visit to the classroom _______.
A to find out kids’ creative ideas B to discuss with the teacher C to give children lectures D to help kids with their program
9 .But even if every large city purified and reused its water, we still would not have enough. Where could we turn next? To the oceans! All we’d have to do to make use of the vast amount of sea-water is --- remove the salt. This salt-removing process is already in use in many parts of the world.According to the passage, sea-water can be turned into fresh water by_____
A heating it up. B treating it with chemicals. C taking salt out of it. D drying it up.
10 .Mobile phones should carry a label if they proved to be a dangerous source of radiation, according to Robert Bell, a scientist. And no more mobile phone transmitter towers（发射塔） should be built until the long-term health effects of the radiation they emit（放射） is scientifically evaluated, he said. "Nobody’s going to drop dead overnight but we should be asking for more scientific information," Robert Bell said at a conference on the health effects of low-level radiation. "If mobile phones are found to be dangerous, they should carry a warning label until proper shields can be devised," he said.According to Robert Bell, if mobile phones prove to be dangerous to people's health, _____.
A they should be banned immediately. B the use of them should be restricted. C all transmitter towers should be torn down. D a warning label should be attached.
