裁判吹响了哨子。

The referee blew his ___whistle.

听到好消息时，她情不自禁地吹起了口哨。

She couldn't help but ___whistle when she heard the good news.

裁判吹响了哨子，示意比赛开始。

The referee blew the ___whistle to signal the start of the game.

子弹呼啸着穿过空气。

The bullet ___whistled through the air.

教练吹口哨示意球员们集合。

The coach ___whistled to gather the players.