二、完形填空(20%) Living one’s life is really like driving on a highway. First, to make a good driving, the driver must carefully examine the 31 of his car, just as he cares for his health for a good life.   3 2 he enters into the highway, he must   3 3 certain rules for his own safety. It also can be said that he must obey certain rules of society when living as a decent (体面的) adult. For example, on the highway, he is   3 4 to keep a constant (不断的) 35 , which can be compared with his 36 activities through his life. Neither driving nor living must be taken at too 37 a speed nor at too slow a speed. If he drives too 38 , the police will give him a 39 , just as he will be arrested when he breaks the law.   4 0 too conservatively (保守地), he will be called an out-of-date person   4 1 the others driving at a(an)   4 2 speed. When he wants to change his lanes, he must give careful   4 3 to every direction of his car. It is sometimes dangerous to change the way of life   4 4 he can be sure of completion (完成,结束) by doing so. He 45 not make any unnecessary changing of lanes（车道）which gives him only danger. Finally, he must 46 where he is now by recognizing some 47 appearing now and then. If he takes the wrong way, he must return to the right as soon as he can. But he may thus lose 48 and energy both on the road and in life. On the whole, driving on a highway and living one’s life are both hard work. 49 if he is careful and serious enough,   5 0 will provide him with much pleasure. 31.  A. seats       B. condition       C. petrol     D. passengers 32.   A. Once        B. While        C. For         D. Although 33.   A. listen to       B. find           C. follow    D. insist on 34.   A. ordered        B. supposed        C. believed         D. hoped 35.   A. state        B. speed         C. mind      D. level 36.   A. outdoor        B. broken              C. good       D. continuous 37.   A. large        B. high          C. limited    D. expected 38.   A. speedily       B. slowly       C. Hurriedly  D. willingly 39.   A. ticket       B. lift                C. chance    D. hand 40.   A. Acting            B. Running         C. Getting    D. Working 41.   A. persuading    B. getting       C. Bothering  D. refusing 42.   A. average        B. normal       C. usual      D. fast 43.   A. notice       B. attention        C. signs       D. regards 44.   A. if                B. when         C. unless     D. because 45.   A. dare         B. need          C. may        D. should 46.   A. think       B. discover         C. prove      D. seem 47.   A. signs        B. signals       C. posters    D. symbols 48.   A. money            B. luck           C. time       D. trust 49.   A. Therefore     B. But            C. And        D. Then 50.   A. it           B. he           C. they       D. You