I’ve made a mistake, though I didn’t ________

No matter how hard the government has tried to search for it, the missing Malaysian flight MH370 is still nowhere _________.

David is taller than _________ in his class.

You’d better carry a(n)tyre in the back of your car in case it breaks down on the way.

He was in hospital for six months. He felt as if hewas ______ from the outside world.