Who is _________ in your school, Mr Wang or Ms Lee?       

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

There is _____pollution and ____fishes in the river now than 20 years ago.

What kind of animal do you like ____ , the tiger, the lion or the elephant?

I think there will be ______pollution and ______ cars in the future.