He managed to keep the enemy at bay.

We can discuss this topic at a later stage.

At some stage, we will need to make a decision.

She is kind at heart.

At the tone , please state your name and purpose for the call.

You should at a minimum have a business plan and a budget.

I always take my best friend at her word.

You should study for at least two hours every day.

You should study for at least two hours every day.

They all arrived at once.