Sentence examples for challenging is that from inspiring English sources
One of the things that makes the experience challenging is that methods of teaching living foreign languages are drawn from the way dead languages were taught.
What has made this review challenging is that the Internet has grown and flourished by not being dominated by a single entity.
"Behavioral economics is not challenging the mainstream concept that selfishness is an important motive; what we are challenging is that it is the only motive".
SE: I think what's challenging is that it's art and science.
"What's challenging is that autism is a hidden disability.
"And the reason that's so challenging is that it means limiting resources for people doing really good stuff.
How challenging was that?
How challenging was that to do?
A more stringent revegetational challenge is that following strip-mining.
The most challenge is that flow regime around horizontal wells is not constant.
One assumption he challenged was that downtown Oakland was overbuilt.
