老奶奶非常开心，眼中闪烁着幸福的光芒。

The elderly woman beamed with ___joy, her eyes sparkling with ___happiness.

他开怀大笑，整张脸因快乐而焕发光彩。

He laughed ___heartily, his whole face lighting up with ___happiness.

简单的生活常常能带来最大的快乐。

A simple life often brings the greatest ___happiness.

看到孩子们开心的笑容，他感受到了真正的幸福。

Seeing the children's joyful smiles, he felt true ___happiness.