大炮轰鸣，炮弹飞射而出。

The cannon ___fired, and a projectile flew out.

士兵收到命令后立即开火。

The soldier ___fired immediately after receiving the order.

经理因为员工经常迟到解雇了他。

The manager ___fired the employee for being late frequently.

他因为经常迟到被公司解雇了。

He was ___fired for being late to work too often.

士兵在训练时向靶子射击。

The soldier ___fired at the target during training.