急需新概念第三册 42课课文

Lesson 42

Modern cavemen现代洞穴人

Listen to the tape then answer the question below.听录音，然后回答以下问题。

With what does the writer compare the Gouffre Berger？

Cave exploration， or pot-holing， as it has come to be known， is a relatively new sport. Perhaps it is the desire for solitude or the chance of making an unexpected discovery that lures people down to the depths of the earth. It is impossible to give a satisfactory explanation for a pot-holer's motives. For him， caves have the same peculiar fascination which high mountains have for the climber. They arouse instincts which can only be dimly understood. Exploring really deep caves is not a task for the Sunday afternoon rambler. Such undertakings require the precise planning and foresight of military operations. It can take as long as eight days to rig up rope ladders and to establish supply bases before a descent can be made into a very deep cave. Precautions of this sort are necessary