Little ________ about his own safety, though he was in great danger himself.
The workers agreed to ________ the strike if the company would satisfy their demands.
These articles ________ the problems of the modern world, including race relations and community development.
Urban crowdedness would be greatly relieved if fares ________ on public transport were more reasonable.
--- I forgot to do my homework. Don’t tell the teacher. --- I won’t tell anybody, but do you think you can _______ it?
It’s not until we know more about it _______ be able to improve the situation.