他迟到的原因是路上堵车。

The ___reason he was late was the traffic jam.

人类具有理性思考的能力，这是区别于动物的特征之一。

The ability to use ___reason is what sets humans apart from other animals.

他拒绝邀请的理由是他那天已经有安排了。

His ___reason for declining the invitation was that he already had plans that day.

她试图用逻辑推理来说服他改变主意。

She tried to ___reason with him to change his mind.