当检测到烟雾时，火灾警报立即响起。

The fire alarm sounded ___instantly when smoke was detected.

借助现代技术，我们可以立即与世界各地的人交流。

With modern technology, we can communicate ___instantly with people around the world.

她立刻认出了这首歌，并开始跟着哼唱。

She recognized the song ___instantly and started humming along.