看到孩子们开心的笑容，这让我感到非常满足。

Seeing the children's happy smiles ___gratified me greatly.

他买了一大盒冰淇淋来满足自己对甜食的渴望。

He bought a big box of ice cream to ___gratify his craving for sweets.

他经常用零食来满足孩子的任性要求。

He often ___gratifies his child's unreasonable demands with snacks.