她失去了冷静，开始大喊大叫。

She ___lost ___her ___cool and started shouting.

当电脑崩溃时，他失去了冷静。

He ___lost ___his ___cool when the computer crashed.

在辩论中，那位政治家失去了冷静，侮辱了他的对手。

During the debate, the politician ___lost ___his ___cool and insulted his opponent.