51. A. service B. discount C. protection D. advice
52. A. for B. as C. with D. in
53. A. last B. all C. once D. risk
54. A. leading B. causing C. diagnosing D. repeating
55. A. put B. go C. take D. keep
56. A. worthy B. full C. proud D. capable
57. A. final B. differential C. usual D. early
58. A. doctors B. researchers C. patients D. nurses
59. A. carries B. has C. requires D. makes
60. A. reason B. purpose C. treatment D. chance
61. A. account B. trouble C. confusion D. effort
62. A. what B. that C. since D. it
63. A. beats B. failures C. attacks D. shapes
64. A. suffered B. launched C. avoided D. started
65. A. option B. method C. proposal D. data
参考答案
51-55 CBDCC 56-60 DDCDA 61-65 ABAAD