Definition: a loud noise that warns you of danger Level: B1
响亮的警报声吵醒了大楼里的所有人。
The loud ___alarm woke everyone in the building.
烟雾警报器能在火灾中挽救你的生命。
A smoke ___alarm can save your life in a fire.
火警警报响了，所以我们所有人都离开了办公室。
The fire ___alarm went off, so we all left the office.
