蝴蝶在花园中轻盈地飞舞着。

Butterflies are ___fluttering gracefully through the garden.

她没时间练习演讲，只能即兴发挥。

She had no time to practice the speech and ended up ___winging it.

他骑着摩托车飞速穿过街道。

He was ___whizzing through the streets on his motorcycle.