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　　Living one's life is really like driving on a highway. First, to make a good driving,the driver must carefully examine the 1 of his car, just as he cares for his health for a good life. Once he enters into the highway, he must 2 certain rules for his own safety. It also can be said that he must obey certain rules of society when living as a decent (體面 的)adult. For example, on the highway, he is required to keep a constant speed which can be compared with his 3 activities through his life. Neither driving nor living must be taken at too high a speed or at too slow a speed. If he drives too 4 , the po-lice will give him a ticket, just as he will be arrested when he breaks the law. Acting too conservatively(保守地), he will be called an out-of-date person 5 the others driving at the proper speed. When he wants to change his lanes, he must give careful 6 to every direction of his car. It is sometimes dangerous to change the way of life unless he can be sure of completion by doing so. He 7 not make any unnecessary changing of lanes which gives him only danger. Finally,he must discover where he is now by recog-nizing some 8 appearing now and then. If he takes the wrong way, he must return to the right as 9 as he can. But he may thus lose time and energy both on the road and in life. On the whole, driving on a high-way and living one's life are both hard work. But if he is careful and serious enough, 10 will provide him much pleasure.