单项选择题

The word "exploit" (Line 6, Para 3 )means______.

A．develop further
B．oppress
C．make an unfair use of
D．make a full use of
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单项选择题
What can be preceded according to the passage
A．The evolution of the speech in the long run.
B．The time when early man mastered language
C．Description about the Ice-aged climate.
D．Other factors functioned in the evolution of human brains.
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
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