炸弹在一个繁忙的市场附近爆炸了。

The ___bomb exploded near a busy market.

在市中心发现了一个汽车炸弹。

A car ___bomb was found in the city center.

一颗炸弹爆炸了，一个男孩从事故中救了我。

A ___bomb had exploded, and a boy rescued me from the accident.