我有一篇十页的论文下周一要交，是为历史课准备的。

I have a ten-page ___paper due for my history class next Monday.

我写了一篇关于非洲儿童的论文——他们关于内战的情感。

I wrote a ___paper about children in Africa - their feelings concerning the Civil war.

她提交了一篇关于气候变化的研究论文。

She submitted a research ___paper on climate change.