3 sentences

1. 他向学会提交了研究报告。

   tā xiàng xué​huì tí​jiāo le yán​jiū bào​gào.

   He submitted a research report to the academic society.

   Source: Dong Chinese Dictionary

2. 他在为那份研究报告收集相关资料。

   tā zài wèi nà fèn yán​jiū bào​gào shōu​jí xiāng​guān zī​liào.

   He is gathering relevant materials for the research report.

   Source: Dong Chinese Dictionary

3. 我们需要评估这份研究报告内容的完整性。

   wǒ​men xū​yào píng​gū zhè fèn yán​jiū bào​gào nèi​róng de wán​zhěng​xìng.

   We need to evaluate the completeness of the content in this research report.

   Source: Dong Chinese Dictionary