keep a straight face in a sentence

Examples

1. Use it as a conversation starter _ all you gotta do is keep a straight face.
2. It's hard to keep a straight face when you're being called the biggest jerk in the world.
3. Pakledinaz tried to keep a straight face _ despite its lipstick marks _ during his acceptance speech.
4. Sorry, just couldn't keep a straight face.
5. Whiteboy finds this absolutely hilarious and can barely keep a straight face when Real enters the room.
6. and must therefore keep a straight face.
7. Of course, Tapia ( 41-0-2 ) cannot keep a straight face anywhere, much less in the ring.
8. No one can keep a straight face.
9. Even Madison can't keep a straight face.
10. He could not keep a straight face.