她去年夏天在一个难民营做志愿者。

She volunteered at a refugee ___camp last summer.

士兵们被驻扎在边境附近的一个军营里。

The soldiers were stationed in an army ___camp near the border.

战争期间，许多囚犯被关押在战俘营里。

During the war, many prisoners were held in a prison ___camp.