蓬松的白云正飘过天空。

Fluffy white clouds were ___floating across the sky.

钢琴演奏的声音从敞开的窗户飘出。

The sound of piano-playing ___floated out through the open window.

一个气球松脱了，正在微风中飘走。

A balloon got loose and was ___floating away in the breeze.