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"．

　　格拉斯哥的勞里教授在門上貼了這樣一個(gè)通知："勞里教授今天不會他的班。" 一個(gè)學(xué)生讀了通知后，擦掉了字母"c"。 后來勞里教授來了，也想開開玩笑，他擦掉了字母"l"。