Is it natural in English to say 'keep it a mystery'?<br/>What are you doing? Let's keep that a mystery. I can't tell you what I'm doing.<br/><br/>Is this a natural way to ask 'how things are going?'<br/>Is everything going well?<br/><br/>Is this natural to say 'give 100% in everything I do'?<br/><br/>I always give 100% in everything I do<br/><br/>Thanks