Here is how I would have written your sentences:
What are you in need of?
He didn't pass the examination for lack of knowledge.
It's very useful to know a foreign language.
I'm not sure what you're trying to ask in the last question. "Is running in the morning any good?" might be what you want. It depends on what you mean by 'good'. It could mean, "Is running in the morning healthy?", "Is running in the morning enjoyable?", etc.