2012六級答案：6月英語六級完型填空答案(文都版)

62. notion
    63. before
    64. on
    65. proposed
    66. evidence
    67. original
    68.however
    69. effort
    70. opposed
    71. once
    72. techniques
    73. inside
    74. lessons
    75. enhance
    76. convince
    77. trouble
    78. diligent
    79. process
    80. concentrate
    81. or