完型填空：
67. B) reveals
68. D) staff
69. A) while
70. B) shortages
71. A) surveyed
72. B) private
73. C) concerned
74. D) recruit
75. D) As
76. B) for
77. D) intensify
78. B) technical
79. A) priority
80. D) subjects
81. D) if
82. A) rate
83. B) particular
84. A) highlighted
85. B) workforce
86. C) where
