他在揉眼睛，因为觉得有点痒。

He's ___rubbing his eyes because they feel itchy.

他在不停地揉眼睛，看起来很困。

He kept ___rubbing his eyes because he looked so sleepy.

我的新鞋一直在磨我的脚后跟。

My new shoes keep ___rubbing against my heels.