毫无预兆地，那座旧桥在卡车的重压下坍塌了。

Without warning, the old bridge ___gave ___way under the weight of the truck.

马拉松后筋疲力尽，她冲过终点线时感到膝盖发软。

Exhausted from the marathon, she felt her knees ___give ___way as she crossed the finish line.

由于多年失修，木地板坍塌了，导致了一场小事故。

The wooden floor ___gave ___way after years of neglect, causing a minor accident.