Living one&39; s life is really like driving on a highway. First,to drive well,the driver must carefully examine the (1) of his car,just as he cares for his own health. Once he goes on the highway,he must (2) certain rules for his own safety. Just as he must obey certain rules of society in order to be a decent (体面的) human being. For example, on the highway,he is (3) to keep a constant speed which can be compared with his (4) life. Neither driving nor living must be taken at too (5) a speed nor at too slow a speed. If he drives over (6),the police 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 old-fashioned (7) others as they drive at the proper speed. When he wants to change lanes, he must pay (8) to what he is doing and check in every direction. It is sometimes dangerous to change our way of life (9) one can be sure of success. He (10) not make any unnecessary changing of lanes which may be dangerous. Finally, he must discover where he is now by recognizing some (11) appearing now and then. If he takes the wrong way,he must return to the right as (12) as he can. But he may thus lose (13) and energy both on the road and in life. On the whole, driving on a highway and living one&39; s life are both hard work.(14) if he is careful and serious enough,(15)will provide him much pleasure. the driver must carefully examine the (1) of his car