PART FIVE   Cloze

67. D  depends
68. D  adequate
69. A  currently
70. C  challenges
71. B  retirement 
72. A  over
73. B  Learning
74. D  on
75. C  needs
76. D  portion
77. A  When
78. A  neighbors
79. B  ever
80. C  In particular
81. C  adjust
82. D  to
83. B  unpredictable
84. C  available
85. A  sense
86. D  roles