你有任何理由怀疑她吗？

Do you have any reason to ___doubt her?

你应该怀疑那个新闻来源的可靠性。

You should ___doubt the reliability of that news source.

尽管他自信地宣称，我仍然怀疑他的专业能力。

Despite his confident claims, I still ___doubt his expertise.