Humanity uses a little less than half the water available worldwide. Yet occurrences of shortages and droughts (干旱) are causing famine and distress in some areas, and industrial and agricultural by-products are polluting water supplies. Since the world's population is expected to double in the next 50 years, many experts think we are on the edge of a widespread water crisis.

　 But that doesn't have to be the outcome. Water shortages do not have to trouble the world---if we start valuing water more than we did in the past. Just as we began to appreciate petroleum more after the 1970s oil crises, today we must start looking at water from a fresh economic perspective. We can no longer afford to consider water a virtually free resource of which we can use as much as we like in any way we want.

　 Instead, for all uses except the domestic demand of the poor, governments should price water to reflect its actual value. This means charging a fee for the water itself as well as for the supply costs.

　 Governments should also protect this resource by providing water in more economically and environmentally sound (健康的) ways. For example, often the cheapest way to provide irrigation water in the dry tropics is through small-scale projects, such as gathering rainfall in depressions (凹地) and pumping it to nearby cropland.

　 No matter what steps governments take to provide water more efficiently, they must change their institutional and legal approaches to water use. Rather than spread control among hundreds or even thousands of local, regional, and national agencies that watch various aspects of water use, countries should set up central authorities to coordinate (调整) water policy.

What is the real cause of the potentials water crisis.

　　A. Only half of the world's water can be used.

　　B. The world population is increasing faster and faster.

　　C. Half of the world's water resources have been seriously polluted.

　　D. Humanity has not placed enough value on water resources.

As is indicated in the passage, the water problem _________ .

A. is already serious in certain parts of the world.

B. has been exaggerated by some experts in the field

　　C. poses a challenge to the technology of building reservoirs(水库)

　　D. is underestimated by government organizations at different levels

According to the author, the water price should _______ .

　　A. be reduced to the minimum        B. stimulate domestic demand

　　C. go with its real value             D. take into account the occurrences of droughts

In order to raise the efficiency of the water supply, measures should be taken to ______ .

　　A. guarantee full protection of the environment

　　B. centralize the management of water resources

　　C. increase the sense of responsibility of agencies at all levels

D. encourage local and regional water resources

Sport is not only physically challenging, but it can also be mentally challenging. Criticism from coaches, parents, and other teammates, as well as pressure to win can create an excessive amount of anxiety or stress for young athletes(运动员). Stress can be physical, emotional, or psychological and research has indicated that it can lead to burnout. Burnout has been described as dropping or quitting of an activity that was at one time enjoyable.
　　The early years of development are critical years for learning about oneself. The sport setting is one where valuable experiences can take place. Young athletes can, for example, learn how to cooperate with others, make friends, and gain other social skills that will be used throughout their lives. Coaches and parents should be aware, at all times, that their feedback to youngsters can greatly affect their children. Youngsters may take their parents' and coaches' criticisms to heart and find a flaw (缺陷) in themselves.
　　Coaches and parents should also be cautious that youth sport participation does not become work for children. The outcome of the game should not be more important than the process of learning the sport and other life lessons. In today's youth sport setting, young athletes may be worrying more about who will win instead of enjoying themselves and the sport. Following a game many parents and coaches focus on the outcome and find fault with youngsters' performances. Positive reinforcement should be provided regardless of the outcome. Research indicates that positive reinforcement motivates and has a greater effect on learning than criticism. Again, criticism can create high levels of stress, which can lead to burnout.
【小题1】An effective way to prevent the burnout of young athletes is ______

C
Sport not only is physically challenging, but it can also be mentally challenging. Criticism (批评) from coaches, parents, and other teammates, as well as pressure to win can create an excessive (过度的）amount of anxiety or stress for young athletes. Stress can be physical, emotional, or psychological, and research has indicated that it can lead to burnout. Burnout has been described as dropping or quitting of an activity that was at one time enjoyable.
　　The early years of development are critical years for learning about oneself. The sport setting is one where valuable experiences can take place. Young athletes can, for example, learn how to work together with others, make friends, and gain other social skills that will be used throughout their lives. Coaches and parents should be aware, at all times, that their feedback to youngsters can greatly affect their children. Youngsters may take their parent's and coaches’ criticisms to heart and find a flaw（缺陷）in themselves.
　　Coaches and parents, should also be careful that youth sport participation doesn't become the work for children. The outcome of the game should not be more important than the process of learning the sport and other life lessons. In today’s youth sport setting(环境), young athletes may be worrying more about who will win instead of enjoying themselves and the sport. Following a game, many parents and coaches direct their attention on the outcome（=result）and find fault with young people’s performances. Research indicates that positive reinforcement motivates (积极强化激励) and has a greater effect on learning than criticism. Again criticism can create high levels of stress, which can lead to burnout.
74. An effective way to prevent the burnout of young athletes is________.
　　A. to reduce their mental stress　                B. to increase their sense of stress
　　C. to make sports less competitive   　           D. to make sports more challenging
75. According to the passage, sport is positive for young people in that________.
　　A. it can create high levels of stress
　　B. it enables them to find flaws in themselves
　　C. it can provide them with valuable experiences
　　D. it teaches them how to set realistic goals for themselves
76. According to the passage parents and coaches should________.
　　A. pay more attention to letting children enjoy sports
　　B. help children to win every game
　　C. train children to deaf with stress
　　D. enable children to understand the positive aspect of sports
77.The author’s purpose in writing the passage is to________.
　　A. teach young athletes how to avoid burnout
　　B. persuade young children not to worry about criticism
　　C. stress the importance of positive reinforcement to children
　　D. discuss the skill of mixing criticism with encouragement

The _____ of his clothes indicated too clearly that he had been playing football.

　　A. state  B. condition C. occasion   D. situation

Humanity uses a little less than half the water available worldwide. Yet occurrences of shortages and droughts (干旱) are causing famine and distress in some areas, and industrial and agricultural by-products are polluting water supplies. Since the world's population is expected to double in the next 50 years, many experts think we are on the edge of a widespread water crisis.

　 But that doesn't have to be the outcome. Water shortages do not have to trouble the world---if we start valuing water more than we did in the past. Just as we began to appreciate petroleum more after the 1970s oil crises, today we must start looking at water from a fresh economic perspective. We can no longer afford to consider water a virtually free resource of which we can use as much as we like in any way we want.

　 Instead, for all uses except the domestic demand of the poor, governments should price water to reflect its actual value. This means charging a fee for the water itself as well as for the supply costs.

　 Governments should also protect this resource by providing water in more economically and environmentally sound (健康的) ways. For example, often the cheapest way to provide irrigation water in the dry tropics is through small-scale projects, such as gathering rainfall in depressions (凹地) and pumping it to nearby cropland.

　 No matter what steps governments take to provide water more efficiently, they must change their institutional and legal approaches to water use. Rather than spread control among hundreds or even thousands of local, regional, and national agencies that watch various aspects of water use, countries should set up central authorities to coordinate (调整) water policy.

1.What is the real cause of the potentials water crisis.

　　A. Only half of the world's water can be used.

　　B. The world population is increasing faster and faster.

　　C. Half of the world's water resources have been seriously polluted.

　　D. Humanity has not placed enough value on water resources.

2.As is indicated in the passage, the water problem _________ .

A. is already serious in certain parts of the world.

B. has been exaggerated by some experts in the field

　　C. poses a challenge to the technology of building reservoirs(水库)

　　D. is underestimated by government organizations at different levels

3. According to the author, the water price should _______ .

　　A. be reduced to the minimum        B. stimulate domestic demand

　　C. go with its real value             D. take into account the occurrences of droughts

4.In order to raise the efficiency of the water supply, measures should be taken to ______ .

　　A. guarantee full protection of the environment

　　B. centralize the management of water resources

　　C. increase the sense of responsibility of agencies at all levels

D. encourage local and regional water resources