单项选择题

Once grey wolf could be found in many parts of the earth.

A． Right.
B． Wrong.
C． Doesn't say.
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单项选择题
We can find more and more grey wolves in Alaska.
A． Right.
B． Wrong.
C． Doesn't say.
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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