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. ______