他们正在寻找改进业务的方法。

They are looking for ways to ___improve the business.

医生建议多吃蔬菜来改善你的健康状况。

The doctor suggested eating more vegetables to ___improve your health.

他的网球技术在过去几个月里进步了很多。

His tennis skills have ___improved a lot in the past few months.

他们正在改进这款应用程序，让它运行得更快。

They are ___improving the app to make it run faster.