Definition: to demand that something happens Level: C2
活动人士呼吁禁止攻击性武器。
The activists ___call ___for a ban on assault weapons.
社区领导人要求立即采取行动应对气候变化。
Community leaders ___call ___for immediate action to address climate change.
工会要求对工作场所安全违规行为进行彻底调查。
The union ___call ___for a thorough investigation into workplace safety violations.
