Mr. Black is a doctor. He works _____.[ ]

Don’ttoo late，or you will feel tired in class tomorrow．

Are they ______books? –No, they aren’t. They’re ______ books.

It’s said that an Asian Culture Village__________ inside the AYG Village in Nanjing in the coming Asian Youth Games period.

How can I get on well with others, Dad? — Try to smile to others, boy. That will make ________ much ________ .