Class and Ass

　　Professor Laurie of Glasgow put this notice on his door："Professor Laurie will not meet his classes today．" A student，after reading the notice，rubbed out the"c"． Later Professor Laurie came along，and entering into the spirit of the joke，rubbed out the"l"．

　　格拉斯哥的劳里教授在门上贴了这样一个通知："劳里教授今天不会他的班。" 一个学生读了通知后，擦掉了字母"c"。 后来劳里教授来了，也想开开玩笑，他擦掉了字母"l"。