如果我觉得无聊，我会溜出房间。

I'll ___slip ___out of the room if I get bored.

我的任务是溜出舞厅，拍摄有关英国战争计划的文件照片。

My mission was to ___slip ___out of the ballroom and take pictures of the papers about the plans of Britain regarding the war.

他悄无声息地溜过了狭窄的缝隙。

He ___slipped ___through the narrow gap without making a sound.