【简答题】

    I happened to meet some American tourists . I greeted to    
them in English and then we began to chat . I got know    
that they were college students travel in China . Most  of    
them were fond of Chinese medicine . They are busy taking    
pictures and were much impressed with the changes that    
had been taken place in the past few years as well . After    
that , we went boating on a lake and having a good time .   
We exchanged our email address so that we could write to    
each other in future . They thanked us again and again . I    
was very glad to have a chance to practising my oral English .