3 sentences

1. 一个士兵向汽车开火。

   yī​ge shì​bīng xiàng qì​chē kāi huǒ.

   A soldier opened fire on the car.

   Source: UM-Corpus: Science

2. 告诉他们不要开火。

   gào​sù tā​men bù​yào kāi huǒ.

   Tell them not to fire.

   Source: OpenSubtitles

3. 当士兵们准备开火时，发生了一件事。

   dāng shì​bīng men zhǔn​bèi kāi huǒ shí, fā​shēng le yī jiàn shì.

   As the soldiers prepared to fire, something happened.

   Source: CCMatrix