单项选择题

Whether the giant panda belonged to the bear of raccoon families was a matter of zoological contention for years.

A．controversy
B．confusion
C．enterprise
D．scrutiny
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单项选择题
The large red ants can dig as deep as ten feet to establish nests and retrieve soil for their mounds.
A．store up
B．throw out
C．bring back
D．pile up
单项选择题
Within the bounds of given data, the biographer seeks to illuminate factual information about a person and transform it into insight.
A．concentration
B．networks
C．goals
D．constraints
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