要求知道

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

道他们向你提出了最无理的要求。

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

道他们对你提出了最不合理的要求。

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

医生要求他另一份表格后，但焦急地要道它们(应该是表格的内容来的)是什么。