My husband was out of the country on a business trip.
He did say something about an important business trip coming up.
I wasn't too specific about the reason for my business trip, however.
"He's gone for two weeks on a business trip and he never calls home once to see how his wife's doing?"
"Is the business trip really going to take us all five days?"
He may have killed a friend on a business trip and now, from the looks of things, he's after her.
I'd told her I was off on a business trip.
We're not on a business trip just now, but we might be later.
"She could be away on a business trip for her father."
He had spent a good deal of money to bring her along on this business trip.