单项选择题

Questions 14 to 16 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.
What is the talk mainly about

A．Problems with pesticides.
B．Characteristics of one type of falcon.
C．Migratory patterns of birds.
D．Tracking systems for animals.

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单项选择题

单项选择题

Questions 14 to 16 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. What is the talk mainly about 您的浏览器不支持 audio 元素。