1. She looked at him with an incredulous expression when he told her he had won the lottery.
她听到他告诉她他中了彩票时，表情怀疑不定。

2. The teacher was incredulous when the student claimed that his dog ate his homework.
当学生声称他的狗吃了他的作业时，老师表示怀疑。

3. I was incredulous when my friend told me she had seen a UFO last night.
当朋友告诉我她昨晚看到了不明飞行物时，我感到难以置信。

4. The politician's promises left the audience incredulous, as they had heard similar empty promises before.
政客的承诺让观众感到怀疑，因为他们之前听过类似的空洞承诺。

5. The scientist's groundbreaking discovery was met with incredulous reactions from his peers.
科学家的突破性发现引起了同行们的怀疑反应。

6. The jury looked incredulous as the defendant tried to explain his actions in court.
陪审团在被告试图在法庭上解释自己的行为时，表现出怀疑的神情。