She made five mistakes in as many lines.

He makes careless mistakes, and does so frequently.

He ran the risk of having an accident.

His health was affected by the great heat.

He ran a great risk in the jungle.

Careful as he was, he made an unexpected mistake.

Many a man has made the same error.

We don't want to risk running a traffic light.

Don't risk insulting your boss.

Nature is under attack on all fronts.

I don't want to risk missing the last train of the day.

I made a mistake through doing it in a hurry.

We often make mistakes.

Acids act on metals.

Don't be afraid of making mistakes.

I made a mistake.

We must not violate the Constitution.

Let's take a chance and go for broke.

Take your time, or you may make some mistakes.

Why did you do such a foolish thing at the risk of your life?