––Beijing is a big city, isn’t it?––Yes. In fact, it’s one of ____ cities in the world.

 In the piano contest, my brother didn’t play well and I did_____.

---What do you think of Andy’s singing? --- No one does       .

We should eat ________ fruit and vegetables, but ________ meat. It is good for our health.

— Are you pleased with the result of the football match?— Sure. We have never had a            one.