听到这个坏消息，他忍不住发出了一声深深的呻吟。

Upon hearing the bad news, he couldn't help but let out a deep ___groan.

他痛苦地呻吟着从沙发上站起来。

He ___groaned in pain as he got up from the sofa.

学生们对又要写作业发出了抱怨声。

The students ___groaned about having to do homework again.