他坐过牢是众所周知的事。

It's ___common ___knowledge that he spent time in jail.

媒体关注影响家庭关系是众所周知的事。

It is ___common ___knowledge that media attention affects family relationships.

锻炼对健康有益是众所周知的事。

It's ___common ___knowledge that exercise is good for health.