他正在轻轻揉搓受伤的膝盖以缓解疼痛。

He is gently ___rubbing his injured knee to ease the pain.

我的新鞋磨脚，把脚磨得很疼。

My new shoes are ___rubbing my feet and making them sore.

她在伤口上轻轻涂了一层药膏。

She gently ___rubbed some ointment on the wound.

我的鞋子在地毯上摩擦发出吱吱声。

My shoes were ___rubbing against the carpet and making a squeaky sound.