单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now listen to the passage.
According to the speaker, what is the possible danger facing bald eagles

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

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单项选择题

单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage. According to the speaker, what is the possible danger facing bald eagles 您的浏览器不支持 audio 元素。