81. broken　 82. afraid　 83. cleverer　 　84. working/cooperating　　　　

79. To increase the size of panda reserves.

78. The area where pandas can live has become smaller.

77. the giant panda was chosen as its symbol

68. Who can join the competition?

[答案]64．On the web site　 65．To help the physically disabled(1ive better)．

67. How many words should be written on the difficulties the disabled have to suffer each day?