这些纸团是失败的草稿。

These crumpled papers are ___failed drafts.

尽管努力学习，他还是没能通过数学考试。

Despite studying hard, he ___failed the math test.

我的手机突然坏了，无法开机。

My phone suddenly ___failed and wouldn't turn on.

他没能按时完成作业。

He ___failed to finish his homework on time.