两国之间的敌对行动持续了三年才最终停火。

The ___hostilities between the two countries lasted for three years before finally ceasing.

该地区的敌对行动已持续了数月。

The ___hostilities in the area have lasted for months.

两国之间的敌对状态持续了十年之久。

The ___hostilities between the two countries lasted for a decade.