—Jane looks down today, what’s up?—Well, ________happened between Jane and me is none of your business.
Living in the central Australian desert has its problems, _____ getting water is not the least.
_____ could be judged from what he had said, he felt terribly sorry for what he had done.
He is my father, _____ a better father does not exist.
_____ is known to us all is that America is a developed country _____ the First World.
The mountain-climbing ___ every one of us.