老师发了一些补充材料来帮助我们更好地准备考试。

The teacher handed out some ___supplementary materials to help us prepare for the exam better.

老师提供了额外的练习题作为补充材料。

The teacher gave us some ___supplementary exercises to practice more.

这本教科书附带了一份补充材料。

This textbook comes with ___supplementary materials.