这是一个有趣的工作机会——如果我是你，我会认真考虑一下。

That's an interesting job offer - I'd give it some ___serious consideration if I were you.

我们得好好谈一谈，你和我。

We've got some ___serious talking to do, you and me.

我认为值得认真考虑一下这些动物。

I think it would be worthwhile to give ___serious thought to these animals.