Section B
Passage One
[26]Snakes may be found just about everywhere except the North Pole region and some islands in the South Pacific Ocean. Some snakes live in warm, dry deserts. Others live in green forests, fields and woodlands. Some never go far from water and are fine swimmers. Some live all their lives in the sea. Most snakes can swim. [27]Because snakes are cold-blooded and depend on warm air for comfort 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 hot weather comes along, snakes find a coolest place possible and stay there. In places where it freezes, 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 their enemies. [28]But compared with other animals, they are believed to be below average in intelligence.

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below average in intelligence是同义表达。