Lesson 40 Who's who
Listen to the tape then answer the question below. How did the policeman discover that the whole thing was a joke? It has never been explained why university students seem to enjoy practical jokes more than anyone else. Students specialize in a particular type of practical joke: the hoax. Inviting the fire brigade to put out a nonexistent fire is a crude form of deception which no self-respecting student would ever indulge in. Students often create amusing situations which are funny to everyone except the victims. When a student recently saw two workmen using a pneumatic drill outside his university, he immediately telephoned the police and informed them that two students dressed up as workmen were tearing up the road with a pneumatic drill.

真假难辨
听录音，然后回答以下问题。 警察是如何发现整件事是一个恶作剧的？ 谁也弄不清为什么大学生好像比任何人都更喜欢恶作剧。 大学生擅长一种特殊的恶作剧――戏弄人。 请消防队来扑灭一场根本没有的大火是一种低级骗局，有自尊心的大学生决不会去做。 大学生们常常做的是制造一种可笑的局面，使大家笑上一场，当然受害者是笑不出来的。 最近有个学生看见两个工人在大学校门外用风钻干活， 马上打电话报告警察，说有两个学生装扮成工人，正在用风钻破坏路面。