该公司为产品发布会制作了新的宣传材料。

The company produced new promotional ___material for the product launch.

老师花了整个周末为周一的历史课准备教学资料。

The teacher spent the weekend preparing the ___material for Monday's history class.

为了这个研究项目，我们收集了许多有用的材料，包括文章、报告和调查数据。

For the research project, we gathered a lot of useful ___material, including articles, reports, and survey data.