单项选择题

A．When it is breeding.
B．When it feels threatened by humans in its territory.
C．When its offspring is threatened.
D．When it is suffering from illness.
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单项选择题
A．It is well known all over the world.B．It has become the topic of an article.C．It has made the front-page headline of the press.D．It has become the title of a best-seller.
A．It is well known all over the world.
B．It has become the topic of an article.
C．It has made the front-page headline of the press.
D．It has become the title of a best-seller.
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