他心脏病发作倒下并去世了。

He ___collapsed and died of a heart attack.

经过漫长而疲惫的战斗，他终于倒下了。

After the long and exhausting fight, he finally ___collapsed.

病人在候诊室突然倒下，需要立即帮助。

The patient suddenly ___collapsed in the waiting room and needed immediate help.