单项选择题

Questions 18 to 20 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.
In which of the following places have snakes never been found

A．In green forests.
B．In the North Pole region.
C．In the Pacific Ocean.
D．In disc deserts.

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单项选择题

单项选择题

Questions 18 to 20 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. In which of the following places have snakes never been found 您的浏览器不支持 audio 元素。