When new evidence emerges, the court often acts upon it swiftly to prevent a miscarriage of justice.

She tried to improve upon the prototype's design before presenting it to the investors.

At the antique fair, collectors competed fiercely to acquire rare Victorian sit upons for their period rooms.

We often rely upon public transportation to get to work on time.

The mayor, calling upon volunteers to help with the relief efforts, spoke passionately at the rally.

When she was called upon to speak, she calmly described the steps of her experiment.

She calls upon the committee to investigate the matter immediately.

The old clock tower casts a long shadow upon the square at dusk.

Upon a sudden, the shepherd's flock scattered across the hillside.

In our meeting tomorrow, I will touch upon the budget cuts and their potential effects.