When climbing the hill John was knocked unconscious by an _____rolling stone. [ ]

It is ten years since the scientist ______ on his life’s work of discovering the valuable chemical.

Excuse me. I want to change some money. Where can I find a bank—I know _________ not far from here. You can easily find _________.

My mother and I ___at home ____that snowy night.

Is this school ____ we visited three years ago?