他努力工作终于重新获得了老板的信任。

After working hard, he finally ___regained his boss's trust.

经过几个月的训练，她终于恢复了之前的体能水平。

After months of training, she finally ___regained her previous fitness level.

经过几个月的治疗，他终于重新获得了行走的能力。

After months of treatment, he finally ___regained the ability to walk.