此题要求你对一段文章改错。现对每一行作出判断是对还是错。如果是对的，在该行右
边横线上画一个勾（√）；如果有错误（每行不会多于一个错误），则按情况改错如下：
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，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。
例：
When I have free time I go Ù a long walk. Some (a) for
People read the books or watch television while (b) the
other have sports. Charles and Linda Mason do (c) √
all of these things as well as climbed buildings. (d) climbing; climb
When you make phone call, you are using the 76._____
first method that man discovered in turning 77._____
sounds into electrical signals but back again. 78._____
Alexander Bell, a American, made the discovery 79._____
over 100 years before, and our telephones today 80._____
are very much the same the one he invented. 81._____
The mouthpiece is a very much simple 82._____
microphone. And the ear-piece is a simple loudspeaker. 83._____
Telephones have to be simple and tough, when people 84._____
drop them or move them about. Voice on the telephone 85._____
sound only roughly as the speakers’ real voices. 86._____
Ways of connecting with people on the phone 87._____
are being speeding up, but the telephone itself 88._____
is also very much the same instrument that 89._____
Bell invents more than a century ago. 90._____