说到烤蛋糕，她可是专家。

She's an expert ___when ___it ___comes ___to baking cakes.

但说到计算机，教学方法缺乏互动。

But ___when ___it ___comes ___to computers, the teaching method lacks interaction.

我平时很自律，但说到垃圾食品，我发现很难抗拒。

I'm quite disciplined, but ___when ___it ___comes ___to junk food, I find it hard to resist.