它唱着一首动听的歌。

It sings a beautiful ___song.

这首歌的旋律非常动听。

The melody of this ___song is very beautiful.

她写了一首关于友谊的歌。

She wrote a ___song about friendship.

花园里回荡着夜莺的歌声。

The garden echoed with the nightingale's ___song.