我的肚子饿得咕噜咕噜响。

My stomach is making a ___rumbly sound because I'm hungry.

爷爷的声音低沉而富有磁性，总让人感到安心。

Grandpa's ___rumbly voice always makes people feel at ease.

飞机起飞时，我的肚子发出咕噜咕噜的声音。

During takeoff, my stomach made a ___rumbly noise.