Definition: If something dangerous or unpleasant breaks out, it suddenly starts. Level: B2
火灾在清晨突然发生。
The fire ___broke ___out in the early morning.
昨晚工厂发生了一场火灾。
A fire ___broke ___out in the factory last night.
抗议期间爆发了暴力事件。
Violence ___broke ___out during the protest.
