英语The relationship between them is being improved. 这句话为什么用is

用英语回答What is the ideal relationship between parents and thei what is the relationship between the man and the woman? What's the relationship between them? what is the relationship in america between business or the what is the relationship between the knowledge and wisdom? The friendly relationship between the two classes is develop what is the relationship between the electric current and re The relationship between the two is developing as nomally as The relationship between the two classes is developing as no In America,the relationship between teachers and students is What is the relationship between language and literature The relationship between language,culture and thought is tha