What is the ______ to Beijing and back?

Before Tom left home, his mother kept telling him to ________ his manners at the party.

Your as a student will be excellent if you develop a habit of reflecting on how you learn.

一I’we heard that another brand of milk powder has been banned .－It’s a shame that some companies lack the sense of social responsibility and       ．

Children need friends ______ their own age to play with.