[26]Snakes may be found just about everywhereexcept the North Pole region and some islands in theSouth Pacific Ocean. Some snakes live in warm, drydeserts. Others live in green forests, fields andwoodlands. Some never go far from water and arefine swimmers. Some live all their lives in the sea.Most snakes can swim. [27]Because snakes are cold-blooded and depend on warm air forcomfort and existence, the largest number of snakes is found in the hottest parts of the earth.Even so, many snakes stay away from the direct rays of the sun when possible. If extra hotweather comes along, snakes find a coolest place possible and stay there. In places where itfreezes, snakes often hide themselves far under the ground or in caves and stay until spring.Snakes are smart enough to stay alive. They are smart enough to find food and kill theirenemies. [28]But compared with other animals, they are believed to be below average inintelligence.

　　Questions 26 to 28 are based on the passage you have just heard.

　　26. In which of the following places have snakes never been found?

　　正确答案：D

　　解析：短文开头就提到，除了北极地区和南太平洋的一些岛屿外，到处都有蛇类。故正确答案为D。

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

　　正确答案：B

　　解析：短文说：“因为蛇类是冷血动物，依赖于温暖的气候，所以热带地区蛇类的数量最多”。由此可知，答案为B。

　　28. How smart are snakes compared with other animals?

　　正确答案：D

　　解析：短文最后提到，“但与其他动物相比，蛇类的智力低于平均值”，故D正确。less intelligent和belowaverage in intelligence是同义表达。

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