短文改错（共10小题；每小题1分，满分10分）
此题要求改正所给短文中的错误。对标有题号的每一行作出判断：如无错误，在该行右边横线上画一个勾（√）；如有错误，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：每行只有一个错误；原行没有错的不要改。
One day I happen to find a chatting room in my QQ,                     76.        
there people were chatting in English. I tried to chat with                      77.        
some of them. To my surprised, I found the oral English                       78.        
of some students were better than mine.                                   79.        
I asked him for advice and they told me to practice more                       80.        
on QQ. But every day after that I would spend one                            81.        
hour practice my oral English on QQ.                                     82.        
Day by day I learned from many useful words and expressions.                  83.        
With time going by, I found that I could even                                84.        
communicate some college students freely.                                 85.