— Excuse me. I want to buy some stamps, but I can’t find a post office. — I know ______ nearby. Come on, I’ll show you. 

Neither side is prepared to talk to _____ unless we can remove the misunderstanding  between them.

Charles Darwin, a young man just out of university, knew perfect well that he had to depend on _____ when he set out on a voyage of discovery around the world. 

— Mum, can I have         to eat? I’m hungry.—You can get some in the fridge.

Someone knocked at your door just now,but I didn’t see who     was.