Definition: If someone collapses, they fall down, usually because they are ill or weak. Level: B2
他昏倒并死于心脏病发作。
He ___collapsed and died of a heart attack.
经过长时间的战斗，他筋疲力尽，倒在了地上。
Exhausted from the long fight, he ___collapsed on the ground.
热浪期间，一名老妇人在街上昏倒了。
During the heatwave, an elderly woman ___collapsed on the street.
