证人们对嫌疑人的清白表示怀疑。

Witnesses have ___cast ___doubt ___on the suspect's innocence.

一位顶尖科学家对政府声称这种药物安全的说法表示怀疑。

A leading scientist has ___cast ___doubts ___on government claims that the medication is safe.

这些战争对我们的仁爱和价值观表示怀疑，尤其在生命权是基本原则的地方。

These wars ___cast ___doubt ___on our humanity and values, especially in places where the right to life is a basic principle.