这座建筑不安全，所以他们立了一个牌子，上面写着“危险——禁止入内”。

The building was unsafe, so they put up a sign saying 'Danger - ___Keep ___out.'

请把狗挡在客厅外面，因为外面很泥泞。

Please ___keep the dog ___out of the living room as it's muddy outside.

施工期间，工人们被告知不要进入标记区域。

During the construction, workers were told to ___keep ___out of the marked zones.