Once ,there was an old woman who lived in a small town near London.She had a son,but her son worked in London, so the old woman wanted to go there to see her son.
She got up early and got the small station at one o'clock in the afternoon.Because this was her first time going to London, and she did not know the train schedule,So she felt very worried. just then ,she saw a little girl running towards her.She stopped Her and asked her what time the train would leave for London.The little girl looked at the woman and said,"[tu: tu: tu:]"Then she ran away.The old woman was very surprised and got very angry.She thought and thought.At last,She began to smile,"The girl did tell me the time"Then she got on the train at the right time.


When did the train leave?