Which is ________ to learn, singing or dancing, baby?

They had _____8-day holiday during this National holidays, but some of them felt unhappy because of _____heavy traffic on the highways.

Here’suseful book .book is written by Bill Gates.

Are you still thinking about yesterday’s game? — Oh, that’s _____ .

I don’t think fast food is good for our health, so I _______ go to MacDonald.