防空导弹击落了一架入侵领空的敌机。

The air defense missile ___shot down an enemy aircraft invading the airspace.

我刚提出新方案就被老板当场否决了。

The boss immediately ___shot down my new proposal.

士兵们奉命击落所有试图越境的敌人。

The soldiers were ordered to ___shoot down any enemies attempting to cross the border.