Read the following article and select the best answer. Article: Many of the world's pollution problems have been caused by the crowding of large groups of people into the cities. Supply for the needs of the people leads to further pollution by industry. If the rapid increase of world population in countries continues at the present rate, there may be much greater harm to human beings. Some scientists speak of the increase in numbers of people as "population pollution." About 2,000 years ago, the world population was probably about 250 million. It reached a billion in 1850. By 1930 the population was two billion. It is now three and a half billion. It is expected to double by the year 2,000. If the population continues to grow at the same rate, there will be 25 billion in the world a hundred years from now. Man has been using the earth's resources more and more rapidly over the past years. Some of them are almost used up. Now many people believe that man's greatest problem is how to control the growth of the population. The material supplies in the world will be far from enough to support the human population in time to come, if the present rate of increase continues. Already there is overcrowding in many cities and starvation in some countries. Should man's population keep on growing so rapidly as before? Many people believe that human survival in the future depends on the answer to this question. Question: If the present rate of increase continue, _ . - the world is going to end - the earth won't be able to support the growing population in the future - pollution has nothing to do with the rapidly increasing population - there would be four billion in the world a hundred years from now
the earth won't be able to support the growing population in the future
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Read the following article and select the best answer. Article: This is a story told or read to children of young ages.The heroine , Cinderella, treated cruelly by her stepmother and her two ugly stepsisters, is helpless until the right magic comes along.She meets her prince and they live together happily. Just a sweet, pretty tale? Not in the view of Ellen Macintosh, who has written much about fairy tales.Ellen' s main concern is with what the story implies. "Instead of standing up to her cruel stepmother and stepsisters, Cinderella just waits for a fairy godmother to appear and solve her problem.But wouldn't you want a daughter of yours to show more spirit?" The story is long lasting, whatever its shortcomings, and it does' t take much to see its influence on a number of recent Hollywood productions.In these versions for the silver screen, the Cinderella character no longer has to clean the house and has no sisters to make her life terrible, though she keeps the way of not showing much courage.The character of the rich and handsome stranger, however, is kept, and in some cases really is a prince.The role of the fairy godmother is often played by luck; we live in a civilized age when even very young children might reject the idea of fairies.In the majority of film versions, the heroine has a profession and is even permitted to continue working after marrying her prince this is the twenty first century, after all. Doesn't the success of these films indicate that the story has relevance to children even today?" Yes,, admits Ellen, who sees its message as being rooted in a fundamental childhood desire for love and attention." Most children experience a sense of inner loneliness as they are growing up and empathize with (...)the character who faces some sort of challenge.This can be seen in the original story of Cinderella, where the fairy godmother tells the heroine that she must learn to be gracious and confident if she is to go to the ball.She has to grow spiritually, and by maturing, she becomes attractive to the prince, thus ensuring that the ending of... Question: In the film versions of the Cinderella story, _ . - luck plays an important role in the heroine' s happy life - Cinderella's family background remains unchanged - the heroine becomes a successful career woman - the character of the prerace is removed.
luck plays an important role in the heroine' s happy life
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Read the following article and select the best answer. Article: Let's do some sleep math.You lost two hours of sleep every night last week because of a big project due on Friday.On Saturday and Sunday,you slept in,getting four extra hours.On Monday morning, you were feeling so bright-eyed that you only had one cup of coffee, instead of your usual two.But don't be cheated by your energy.You're still carrying around a heavy load of sleepiness, or what experts call"sleep debt"----in this case something like six hours,almost a full nights' sleep. Sleep debt is the difference between the amount of sleep you should be getting and the amount you actually get.It's a deficit that grows every time we skim some extra minutes off our nightly sleep."People accumulate sleep debt gradually without being noticed,"says William C.Dement,founder of the Stanford University Sleep Clinic.Studies show that such short--term sleep deprivation leads to a foggy brain,worsened vision,and trouble remembering. Long-term effects include obesity,insulin resistance, and heart disease. A survey by the National Sleep Foundation reports that we're losing one hour of sleep each night----more than two full weeks of sleep every year. The good news is that,like all debt, with some work,sleep debt can be repaid. Adding an extra hour or two of sleep a night is the way to catch up.For the long--term lack of sleep,take it easy for a few months to get back into a natural sleep pattern. Go to bed when you are tired,and allow your body to wake you in the morning(no alarm clock allowed).You may find yourself catatonic in the beginning of the recovery cycle:expect to have ten hours shut-eye per night. As the days pass, however,the amount of sleeping time will gradually decrease. So earn back that lost sleep----and follow the dictates of your innate sleep needs. You'll feel better."When you put away sleep debt, you become a superman,"says Stanford's Dement, talking about the improved mental and physical capabilities that come with being well rested. Question: The example of sleep math is used to show_. - in what case you build up a sleep debt - why you need six hours' sleep every night - why you are full of energy even when you don't have enough sleep - you should drink coffee to keep energetic when you don't have enough sleep
in what case you build up a sleep debt
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