超音速飞机的飞行速度可以比声音传播的速度还快。

Supersonic planes can ___travel faster than the speed of sound.

事故的消息传得很快。

News of the accident ___travelled fast.

在电影里，有很多航天飞机在恒星和行星之间穿梭。

In the film, there were a lot of space shuttles that ___travelled around stars and planets.