问答题

S1. What topic is the passage mainly concerned with

【参考答案】

The development of human civilization．
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单项选择题
A．That he wants something to eat.B．That he will tell them.C．That he is not hungry.D．That he is angry.
A．That he wants something to eat.
B．That he will tell them.
C．That he is not hungry.
D．That he is angry.
问答题
S3. Why do other higher animals fail to use language as man does
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