阅读理解

　　It is the last lesson before the holidays．The students are very happy．Their English teacher is very pleased, too．They play some interesting games．He sings some nice songs with them, and then he goes to the blackboard and writes “SMILES”(微笑)on it．

　　“This is one of the longest words in English．” he says to the class．All the students laugh(大笑), and then one girl stands up and asks：“Why is it the longest word in English?”

　　The teacher doesn't say anything for a minute．Then he smiles, “Because there is a mile between the first letter and the last．”