The United States is wellknown for its network of major highways designed to help a driver get from one place to another in the shortest possible time.　36　these wide modern roads are generally 　37　and well maintained, with 　38　 sharp curves and many straight 　39　,a direct route is not always the most 　40　 one. Large highways often pass 　41　scenic areas and interesting small towns. Furthermore, these highways generally 　42　 large urban centers which means that they become crowded with 　43　 traffic during rush hours,　44　the “fast, direct” way becomes a very slow route. However, there is 　45　always another route to take 　46　 you are not in a hurry. Not far from the 　47　 new “superhighways”,there are often older,　48　 heavily traveled roads which go through the countryside.　49　of these are good two lane roads; others are uneven roads 　50　 through the country. These secondary routes may go up steep slopes, along hilly　51　or down frightening hillsides to towns 　52　 in deep valleys. Though these are less direct routes, longer and slower, they generally go to places　53　the air is clear and the scenery is beautiful, and the driver may have a 　54　 to get a fresh, clean 　55　 of the world.
36. A. Although     B. Since  C. Because      D. Therefore
37. A. rough   B. splendid     C. smooth       D. complicated
38. A. little     B. few     C. much  D. many
39. A. selections     B. separations C. divisions    D. sections
40. A. terrible B. Possible     C. enjoyable   D. reasonable
41. A. to  B. Into    C. over    D. by
42. A. lead      B. connect      C. collect D. provide
43. A. large    B. fast     C. light   D. heavy
44. A. when    B. for      C. but     D. that
45. A. yet       B. still     C. almost D. quite
46. A. unless   B. if C. as       D. since
47. A. relatively     B. regularly    C. reasonably  D. respectively
48. A. and      B. Less    C. more   D. or
49. A. All       B. Several      C. Lots    D. Some
50. A. driving B. crossing     C. curving      D. traveling
51. A. rocks    B. cliffs   C. roads  D. paths
52. A. lying    B. laying C. laid     D. lied
53. A. there    B. when  C. which D. where
54. A. space    B. period C. chance       D. spot
55. A. view     B. variety       C. visit    D. Virtue