How's the business going?  

He is running family grocery business.  

softwarebusiness | hardware business | carbusiness 

Business is good. Business isbad. 

tough business  

Business is growing。

private meeting

business meeting

I will be on business trip next week.

 It's none of your business. 

He has some business to do. 

Keep your nose out  of business！

Mind your own business!

Stop talking. Roll up your sleeves, let's get down to business.