Improve your vocabulary(增加词汇量)    
       
                         Improve your listening comprehension(提高听力水平)    
       
                         Active the atmosphere of the class and stimulate students' learning enthusiasm(活跃课堂气氛,激发学习热情)    
       
                         Know moreforeign countries' culture (了解更多外国文化)    
       
                         Regulate emotions(调节情绪)    
       
                         Others(其他)