阅读下面短文，短文后所给各题的四个选项（A、B、C和D）中，选出能填入相应空白处的最佳选项，并在答题卡上将该项涂黑。
Living one’s life is really like driving on a highway. First, to make a good driving, the driver must carefully examine the  36 of his car, just as he cares for his health for a good life. Once he enters into the highway, he must  37 certain rules for his own safety. It also can be said that he must obey certain rules of 38  when living as a decent (体面的)adult. For example, on the highway, he is 39 to keep a constant speed which can be compared with his  40 activities through his life. Neither driving nor living must be taken at too  41  a speed nor at too slow a speed. If he drives too 42 ,the police will give him a ticket, just as he will be arrested when he breaks the law.  43 too conservatively (保守地), he will be called an out-of-date person  44 the others driving at the proper speed. When he wants to change his lanes, he must give careful  45 to every direction of his car. It is sometimes  46  to change the way of life 47 he can be sure of completion by doing so. He  48  not make any unnecessary changing of lanes which gives him only danger. Finally, he must  49 where he is now by recognizing some 50  appearing now and then. If he takes the wrong way, he must return to the right as  51 as he can. But he may thus lose 52  and energy both on the road and in life.  53 the whole, driving on a highway and living one’s life are both hard work.  54 if he is careful and serious enough,  55 will provide him much pleasure.
36.A. seat        B. condition     C. petrol       D. passenger
37.A. listen to     B. find         C. follow       D. insist on
38.A. society      B. school       C. group       D. highway
39.A. glad         B. required      C. made       D. anxious
40.A. broken       B. outdoor      C. good        D. continuous
41.A. large        B. high        C. limited       D. expected
42.A. speedily     B. slowly       C. orderly      D. willingly
43.A. Doing        B. Acting       C. Going       D. Working
44.A. persuading    B. getting      C. interrupting   D. refusing
45.A. notice        B. attention     C. signs         D. regards
46.A. dangerous     B. worthy      C. unfit         D. troublesome
47.A. if            B. when       C. unless        D. because
48.A. dare          B. need        C. may         D. should
49.A. think         B. discover      C. prove       D. look
50.A. signs         B. roads         C. posters      D. people
51.A. possible      B. soon          C. much        D. hard
52.A. money       B. luck          C. time         D. trust
53.A. In           B. With         C. About       D. On
54.A. Therefore    B. But          C. And         D. Then
55.A. it           B. he          C. they         D. you