短文改错(共10小题；每小题1．5分，满分15分)
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，该行右边横线上画一个勾(√)；
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(八)，在该行右边横线上写出该加的词。
此行错一个词：在错的词下划一横线，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。
Dear students，
The Students' Union was going to hold an English Speech            76. _______
contest in the evening of December 30. The purpose                  77. _______
is increase the students' interest in learning English and               78. _______
improve their spoken English. Which is going to be held in            79. _______
the school main hall and will begins at 7：30. And the                80. _______
best five students of this English contest will be given                 81. _______
prizes. Someone in Grade Three will be                           82.  _______
welcome to take part in it. Those would like to take part              83. _______
in this contest should go to the office of the Students'                 84. _______
Union and sign it up your names and the topics of your               85._______
English Speech. Welcome to this great fun！