此题要求改正所给短文中的错误。对标有题号的每一行做出判断；如无错误，在该行右边横线上画一个钩（√）；如有错误（每行只有一个错误），则按下列情况改正：
此行多一个词：把多余的词用斜线（﹨）划掉，在该行右边横线上写出该词并也用斜线划掉。 
此行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。
此行错一个词：在错的词下画一横线，在该行右边横线上写出改正后的词。 
注意：原行没有错的不要改。 
When my father bought me a computer as a birthday gift for              
76. ________
me in last year, I felt very excited. As we all know, computers             
77. ________
are getting more and more usefully now. Much information can            
78. ________
be stored in them. We can also learn that has lately happened               
79. ________
in the world on the Internet. In the past, people had to do lots of             
80. ________
work which was very dangerous. Now, but, computers can do it           
81. ________
instead. When an exam is coming, I often did some exercises             
82. ________
on my computer. Then it will correct it and tell me the right               
83. ________
answers. In this way it is very convenient for me to prepare                
84. ________
the exam than before. The computer has become my real friend.            
85. ________