What’s the matter ______ you ?—I have a bad cold.[ ]

________ are you, Bella?—I’m 1.5 metres tall.[ ]

David talked with a friend of ____ on the Internet for a long time yesterday.

There will be _____air pollution if there are_____ people driving. –I hope the air will be fresher soon.

I’d like a strawberry ice-cream. Would you like to have______ , too?—No, thanks.