A man is walking down the sidewalk near construction work .
It is improbable that a man is careful to stay on the walkway when he nears an unfished building .
There is a very good chance that a man is careful to stay on the walkway when he nears an unfished building .
It is improbable that a man is careful to stay on the walkway when he nears an unfished building .
A man is careful to stay on the walkway when he nears an unfished building .