Part V Cloze (15 minutes)

　　Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A)， B)， C) and D) on the right side of the paper. You should choose the ONE that best fits into the passage. Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre。

　　答案：

　　62. B)notion

　　63. C)before

　　64. B)on

　　65. A)proposed

　　66. D)evidence

　　67. B)original

　　68. A)however

　　69. C)effort

　　70. C)opposed

　　71. D)once

　　72. D)techniques

　　73. C)inside

　　74. C)lessons

　　75. D)enhance

　　76. A)convince

　　77. A)trouble

　　78. C)diligent

　　79. C)process

　　80. B)concentrate

　　81. D)or