第一节 短文改错
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(每行只有一个错误)，则按下列情况改正：
多一个词：把多余的词用横线(—)划掉，在该行右边横线上写出该词，并也用横线划掉。
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。
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。
Naturalists have long known that the apes, our nearest relative in the animal 76. ______
kingdom, communicate with one and another through gestures, sounds and facial 77. ______
expressions. But it was always thought that only human beings can use words 78. ______
and sentences. In the 1960s, however, researchers set themselves the task of reach 79. ______
chimpanzees to communicate with humans. At first the scientists tried make them 80. ______
to speak. But no chimp ever managed to acquire a vocabulary of more than four words 81. ______
and even these were spoken with great difficult. The breakthrough came when two 82. ______
scientists from the University of Nevada decided to try America Sign Language, 83. ______
system of gestures used by deaf people. After four years, they had taught their first 84. ______
chimpanzees to use 132 signs correctly to communicate their wants and needs. 85. ______