单项选择题

People knew the nature of wolf very well.

A．Right
B．Wrong
C．Doesn't say
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单项选择题
There are fewer grey wolves in Europe than in U.S.
A．Right
B．Wrong
C．Doesn't say
单项选择题
Grey wolves take good care of the young.
A．Right
B．Wrong
C．Doesn't say
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