根据句子意思和所给首字母或中文提示，在标有题号的横线上写出一个英语单词的完整、正确形式，使句意通顺。
76. Jones thought I had heard about the accident. But a_______, I knew nothing about it.
77. True friends always s_________ their sadness and happiness with each other.
78. Many students attended the lecture, i__________ our monitor.
79. With all the problems s________, I felt a great weight taken off my mind.
80. I’m in a difficult s__________ and I don’t know what to do.
81. The Germans speak English with a strong German ________(口音).
82. Are you _________(关心，担心) about your friend when he or she is in trouble ?
83. After one year learning in senior high school , I have a larger ________(词汇) than before .
84. It is not easy for a Chinese person to speak English as ________(流利) as a native English speaker.
85. Although I hadn’t seen Tom for 10 years, I _________(辩认出) him when I saw him in the crowd.