单项选择题

The main point of this passage is ______.

A．evolution of speech
B．darwin's law of natural selection
C．progress of human brains
D．evolution of human intelligence
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单项选择题
The author in the passage uses the following devices in his writing EXCEPT ______.
A．questions
B．narrative
C．analogy
D．comment
单项选择题
What kind of people had the advantages among ancient ancestors
A．Those who could weave with threads.
B．Those who possessed the highest level of language.
C．Those who were creative in tool-making.
D．Those who could play magic.
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