单项选择题

Questions 14 to 16 are based on the following passage you have just heard. You have 15 seconds to read Questions 14—16. According to the speaker, what is the possible danger facing bald eagle

A．Pollution of the environment.
B．Over-killing by hunters.
C．Destruction of their natural homes.
D．A new generation of pest killers.

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单项选择题

单项选择题

Questions 14 to 16 are based on the following passage you have just heard. You have 15 seconds to read Questions 14—16. According to the speaker, what is the possible danger facing bald eagle 您的浏览器不支持 audio 元素。