小男孩生气地用拳头打着沙袋发泄情绪。

The little boy was angrily ___punching the sandbag to vent his frustration.

他在皮革上打孔，准备制作皮带。

He is ___punching holes in the leather to make a belt.

她不耐烦地快速按着遥控器的按钮。

She was ___punching the remote control buttons impatiently.