60. A. challenging B. different C. dangerous D. strange
59. A. worthless B. thoughtless C. hopeless D. helpless
58. A. At B. During C. On D. With
57. A. must B. would C. might D. should
56. A. spirit B. intention C. action D. attempt
55. A. believe B. protect C. treat D. receive
54. A. looked up B went up C. took up D. showed up
53. A. upset B. frightened C. guilty D. ashamed
52. A. patiently B. eagerly C. successfully D. skillfully
51. A. learning B. judging C. obeying D. imagining