How to use "challenge" in a sentence

Divided, there is little we can do - for we dare not meet a powerful challenge at odds and split asunder.

The government's story about contamination is all a big lie, but it's too dangerous to challenge it, or to talk about this."

What was that look in his eyes? A challenge or just a question? Whichever it was, Sala knew the moment had come.

A challenge to reality.

Joel had convinced her that she'd have no difficulty matching his pace or meeting his standards, and that she was equal to the challenge

He was so good that he could safely take young boys into the Sierras for sixteen years, a challenge a lot of other winter survival experts wouldn't touch

She felt up to the challenge now, and she intended to finish the task before she lost her nerve again.

There's a part of you, deep down, that's responding to the challenge with a degree of pleasure."

"But now that you're in real danger again for the first time in years, a part of you is responding to the challenge

No one yet had come out of the building to challenge them, which most likely meant that Danny had jinxed the video security system.