That would have been an extremely foolish thing to do.

He stopped with his mouth open, looking extremely foolish for a moment.

Don't make the extremely foolish mistake of thinking that winning is everything.

If they did not think it an extremely foolish joke.

You did something extremely foolish in order to help Richie.

"It would be extremely foolish of us, especially when he is right and we are wrong."

It would be extremely foolish to make a move before you know exactly what you're up against.

They would be extremely foolish to even think of doing so.

It was extremely foolish of her to get interested in him.

He thought his little master was extremely foolish not to have brought something to eat too.