学校正在清理不合格的教师以提升教学质量。

The school is ___purging unqualified teachers to improve education quality.

医生建议她在体检前不要服用泻药清肠。

The doctor advised her to avoid ___purging before the medical check-up.

我定期清理电脑中的临时文件以释放空间。

I regularly ___purge temporary files from my computer to free up space.