Before accepting the job offer, it's important to know where one stands regarding salary and responsibilities.

Before committing to the project, he had to know what one is about and how his decisions would affect the outcome.

Faced with the choice of hiring a rookie or keeping the problematic veteran, I told myself that better the devil you know and gave the veteran another chance.

When tackling complex wiring, it's important to know what one is doing.

When it comes to classical music, I don't know B from a battledore.

Many customers don't know a B from a battledore when faced with high-tech gadgets.

When her landlord raised the rent and her savings were gone, Maria did not know which way to turn.

Anyone who worked on the audit team long enough will know where the bodies are buried.

When she asked me who broke the vase, I shrugged and said, 'how should I know?'

You always know how to pick 'em—every person you date ends up causing drama.