这个图表清晰地展示了销售额的增长趋势。

This chart ___demonstrates the clear growth trend in sales.

学生们通过演讲展示了他们的沟通技巧。

The students ___demonstrated their communication skills through presentations.

老师通过实验向我们演示了化学反应的过程。

The teacher ___demonstrated the chemical reaction process through an experiment.