A man wearing a uniform is standing just inside the back of a delivery truck , while two other men are standing on the ground near the truck .
It is probable that a delivery man is waiting for two men to help him unload the truck .
It is probable that a delivery man is waiting for two men to help him unload the truck .
It is impossible that a delivery man is waiting for two men to help him unload the truck .
A delivery man is waiting for two men to help him unload the truck .