It was no longer possible to maintain a straight face.

Despite the problem of trying to maintain a straight face, there are distinct advantages to being on Cube's team.

But no doubt she managed on that occasion to maintain a straight face.

As it was, she had difficulty maintaining a smooth face.

When there's no reaction, he continues, struggling to maintain a straight face.

If the rain didn't return, it was soon going to be hard for the man to maintain a muddy face to hide his identity.

"Everyone is trying to maintain a certain face to get through this."

Or is the musician pretending nothing happened and trying to right things while maintaining an innocent face?

Yet the facade had to be maintained, unity shown, and a common face presented to the outside.

For Rahul, the hard part about this version would be maintaining a straight face.