看看你都做了些什么！
Just look at what you've done!

我一点也不明白你在说些什么。
I haven't the slightest idea what you are talking about.

我知道发生了什么事。
I know what happened.

你把门漆成什么颜色？
What color did you paint the door?

硫酸铜溶液是什么颜色？
What color is copper sulfate solution?

你在说什么？
What are you talking about?

让我们分析一下这道题，看什么地方出错了。
Let's analyse the problem and see what went wrong.

你推荐什么？
What do you recommend?