要求知道

I know they have made the most unreasonable demands on you.

我知道他们向你提出了最无理的要。

I know that they made the most unreasonable demands on you.

我知道他们对你提出了最不合理的要。

The doctor asked him to fill out one form after another, but in suspence as to what they were for.

要他另一份，但焦急地要知道它们(应该是的内容来的)是什么。