回答下列各题： Mark Twain was a famous American writer．He wrote many famous stories and they arestilltold in many countries today．Mark Twain alwaysliked to tell funny stories．He also liked to listentofunny stories and to play jokes(开玩笑) on his friends． One day, one of his friends didnt havemoney and asked Mark Twain to pay forhis train ticket． 'But I dont have enough money tobuy both your ticket and mine, 'Mark Twain said． The friend did not know what to do．Hewas very sad．'We can do this, 'said Twain．'We canget on thetrain first and when the conductor(售票员)comes totake the tickets, you can hide( 躲藏) under my seat． ' Later, however, on the train, when theconductor came to take the tickets, Mark Twain gavehim two tickets--one forhimself and one for his friend．Then Mark Twain said, 'My friend here isavery strange man．When he travels on a train, he does not like to sit on theseat．He likes to lie onthe floor under the seat．' Everybody on the train then looked at thepoor man under the seat and started to laugh． Mark Twain was good attelling stories and playing jokes．