我经常说脏话，但即使是我也在某些词语上划清界限。

I swear a lot but even I ___draw ___the ___line ___at certain words.

那么你在哪里划清界限呢？

So where do you ___draw ___the ___line?

作为父母，你必须在不当行为上划清界限。

As a parent, you have to ___draw ___the ___line ___at inappropriate behavior.