She'd told him to wait here and had gone away on urgent business.
"Then I should like to speak to someone else on a matter of the most urgent business."
He had more urgent business to do at the moment.
Out of town on urgent business, even though he hasn't worked for years.
"But you know that I can't tell what urgent business might come up to call me out of town."
What if there had not really been any urgent business?
The most urgent business you have - that anyone has!
T have urgent business I must see to in the near future.
"I have to see a man on some urgent business."
"The dead have more urgent business to do than chase after us."