在危机中，一位真正的领导者会保持冷静。

In a crisis, a true leader ___keeps ___a ___cool ___head.

尽管系统发生故障，飞行员保持冷静，使飞机安全着陆。

Despite the system failure, the pilot ___kept ___a ___cool ___head and landed the plane safely.

急救员保持冷静，迅速评估了伤者。

The paramedic ___kept ___a ___cool ___head and quickly assessed the injured person.