Translation of "doubts" into Chinese

It's written in black and white. How can you be in doubt?

这是白纸黑字写在这儿的你怎么还怀疑?

I cannot forbear expressing my doubts.

我忍不住要說出我的疑惑。

In a way you are right, but I still have doubts.

在某种程度上你是对的,但我还是有疑问。