老师的表扬强化了我对学习的信心。

The teacher's praise ___reinforces my confidence in learning.

工人们用钢筋加固了混凝土墙以提高稳定性。

The workers ___reinforced the concrete wall with steel bars to improve its stability.

指挥官下令增援前线部队以应对敌方进攻。

The commander ordered to ___reinforce the frontline troops to counter the enemy attack.