叛军被关押在一个秘密地点长达数月。

The rebels were ___held ___prisoner in a secret location for months.

敌人决定扣押他们俘虏的高级军官。

The enemy decided to ___keep ___prisoner the high-ranking officers they had captured.

在突袭中，几名平民被敌对势力俘虏了。

During the raid, several civilians were ___taken ___prisoner by the hostile forces.