59 A which B whom C those D who
60 A symptoms B issues C problems D chances
61 A rarely B openly C exactly D regularly
62 A from B into C on D of
63 A these B that C few D those
64 A risk B part C way D share
65 A since B owing C because D due
参考答案:
51. D 52. C 53. B 54. D 55. C
56. B 57. B 58. A 59. D 60. C
61. D 62. A 63. D 64. A 65. C