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    One day Mr Li and Mr Wang went to London to see a friend. They didn't know much English and they knew little about London. They didn't find their friend's home. They walked in the street for a long time. Then they saw a man near a shop. They went up to him and asked the way. The man smiled but said nothing(什么都没说) . Then he put his hand into his pocket and took out a book and read, "I'm sorry, I can't speak English." At last they found their friend's home with the help of a policeman.