what引导什么从句做主语

What in the world did they think they were doing?

他们到底认为自己在做什么？

Things ain't what they used to be.

现在情况不比从前了。

Call it what you will, it's still a problem.

不管怎么说，这仍然是个问题。

What do you charge for this type of work?

这种活你收多少钱？

What do you charge for work of this type?

这种活你收多少钱？