pain

他昨晚感到膝盖一阵剧痛。

He felt a sharp ___pain in his knee last night.

她忍受着背部的疼痛继续工作。

She continued working despite the ___pain in her back.

医生问我哪里疼。

The doctor asked me where the ___pain is.

锻炼后肌肉疼痛是正常的。

Muscle ___pain after exercise is normal.