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.
Why do we find the largest number of snakes in hot regions

A．Snakes like warmth.
B．Snakes like to stay in the sun.
C．Snakes are used to hot weather.
D．Snakes are good swimmers.

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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. Why do we find the largest number of snakes in hot regions 您的浏览器不支持 audio 元素。