他呼吁反叛者停止战斗。

He ___called ___on the rebels to stop fighting.

我在当地报纸《领导者》上看到一则广告，呼吁该地区的居民帮助执行一个清理当地环境的项目。

I saw an advertisement in the local newspaper, The Leader, ___calling ___on residents in this area to help carry out a project to clean up the local environment.

委员会呼吁公司采取可持续的做法。

The committee ___called ___on the companies to adopt sustainable practices.