請幫我猜這幾個英文謎語～～～

1.It is a comfortable bus which

can take you for a long journey.

It's also a person who

train you in a particular sport.

２.It is vehicle which

runs along rails.

It's also a verb that

means"teach a particular skill"

３.It is the language that

people in Beijing speak.

It's also a kind of orange which

is small and has a special taste.

請幫我猜出來ｔｈｘ