1.It is comfortable bus which can take you for a long journey.
It's also a preson who trains you in a particular sport.
2.It is a container that you pull it when you open it.
It's also a person who can draw pictures.
3.It is a vehicle which runs along rails.
It's also a verb that means `teach a particular skill'.
4.It is the language that people in Beijing speak.
It's also a kind of orange which is small and has a special taste.