reform

许多人认为教育体系亟需改革。

Many believe the education system is in urgent need of ___reform.

社会改革通常需要持续的努力和公众的支持。

Social ___reform often requires persistent effort and public support.

我们需要改革医疗体系以提供更好的服务。

We need to ___reform the healthcare system to provide better services.