孩子等待时安静地吮吸着棒棒糖。

The child was quietly ___sucking a lollipop while waiting.

有些人无意识地吮吸拇指，这是从小养成的习惯。

Some people unconsciously ___suck their thumbs as a habit from childhood.

他笑着说，他在日记本页面上下了毒，这样任何用手指翻页并吮吸手指的人都会死。

He laughed and said he poisoned the diary pages so that anyone who ___sucks their fingers to turn them would die.