49．What does the underlined phrase“demographic dividend”in the fourth paragraph refer to?

　　A．Possibility of lower birth rate．

　　B．Benefit gained by working young people．

　　C．Chances for more employment．

　　D．Disadvantages caused by aging population．

　　50．Which of the following public policies does Michal Rutkowski call on?

　　A．To encourage late marriage．

　　B．To reduce world's population．

　　C．To gain economic equality．

　　D．To improve health and education．

　　D

　　How often do you sit still and do absolutely nothing．The usual answer these days is“never”．or“hardly ever”．As the pace of life continues to increase，we are fast losing the art of relaxation．Once you are in the habit of rushing through life，being on the go from morning till night，it is hard to slow down．But relaxation is essential for a healthy mind and body．

　　Stress is fl natural part of everyday life．There is no way to avoid it, since it takes many and varied forms-driving in traffic，problems with personal relationships are all different forms of stress．Stress，in fact，is not the“baddy”it is often reputed to be．A certain amount of stress is vital to provide motivation and give purpose to life．It is only when the stress gets out of control that it can lead to poor performance and ill health．

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