Sentence examples for only one who from inspiring English sources

Hanagan was the only one who understood.

"He's the only one who does.

She was the only one who understood".

"She was the only one who did".

She wasn't the only one who retreated.

I'm the only one who doesn't.

He isn't the only one who does.

She's the only one who understands me".

He was the only one who survived.

"But she's the only one who apologized".

I was the only one who volunteered.