Then, during the angry spending spree, he called with a perfectly acceptable excuse.

It is perfectly acceptable to risk your (normal) contract for an overtrick.

It's perfectly acceptable to cite work, home and other previously arranged commitments as reasons for your unavailability.

Body control through corners is fine and high-speed cruising comfort is perfectly acceptable.

In Barry's absence she had delicately suggested an exit from the kitchen window on to some perfectly acceptable roof tiles.