单项选择题

What was the author's discovery

A．Wolves are migrant beasts, as is almost universally believed.
B．Wolves are settled beasts and possessors of an estate with definite boundaries.
C．Wolves are not interested with strangers.
D．Wolves' family is dominated by a female.

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单项选择题

The author is very likely to be a_____.

A．hunter
B．biologist
C．journalist
D．traveler

单项选择题

Which is true according to the passage

A．The author enjoys staring matches with wolves.
B．Staking the land was kind of dangerous.
C．Wolves can see the estate boundaries clearly with their eyes.
D．The author managed to know why the wolves ignored his presence.