我以为她会听我的——我本该更明智的。

I thought she'd listen to me - I should have ___known ___better.

当然，两个成年人本应更明智，不至于互相大声喊叫。

Surely two grown-ups should have ___known ___better than to shout at each other at the top of their lungs.

经验丰富的司机知道开车时不应该发短信。

Experienced drivers ___know ___better than to text while driving.