单项选择题

The word "versatile" (Line 4, Para. 3) most probably means______.

A．useful and changeable
B．adaptable and flexible
C．flexible and useful
D．adaptable and changeable
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单项选择题
This passage is most probably taken from an article entitled______.
A．the Significance of Language
B．Can Animals Talk
C．the World of Communication
D．Languages in Evolution
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