单词拼写
根据句意及首字母和括号内汉语提示，写出单词完成下列句子
76. She spent years (观察)and recording their daily activities.
77. To make members of a team perform better, the trainer first of all has to know their _____________(强项) and weaknesses.
78. It’s bad _________(礼貌）to talk with your mouth full .
79. She stepped back appearing surprised and put up her hands, as if in （防御）
80. It is wet there that the trees are extremely tall, some m________ over 90 meters.
81. He went to America in the 1980s and s_________ down there.
82. It’s too hot. We’d better sit down in the s of the trees.
83. The building is specially d__________ for the homeless people.
84. During the war this village was s_________ by the enemy and more than 200 people were killed.
85. We are c________ that Chinese athletes can perform well in the London Olympic Games.