Mr Green lives in a town but works in a factory outside another town．It's about twenty kilometers away from his house．He has a car but he thinks it safer to take a slow train and he can read some newspapers in it．

　　Every morning Mr Green goes to the station along a muddy(泥泞)road．When he gets there his shoes are always dirty．So he always puts a pair of clean shoes in his bag and goes to the station in the old ones．Then he takes them off and asks his friend who works at the station to keep them for him and he gets on the train in the clean shoes．

　　This morning Mr Green got up early．After breakfast he had a look at his watch．It was only five past seven．“There is ten minutes left,”Mr Green said to himself and began to read the newspaper．“Oh, dear!”called out his wife．“It's nearly half past seven!Why not start?”

　　Mr Green looked at the clock on the wall and found his watch was slow．He hurried off．When he got to the station, the train was leaving．He took off his old shoes and threw them to his friend and quickly got on the train before it started．He found a seat and was going to put on his clean shoes．Bad luck!He's forgotten to put them into his bag．

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