75%
Help the exhausted assistant director complete his production report for tomorrow's chaotic film shoot.
By the time the director finally yells "Cut!" tomorrow evening, the actors __________________________________ in the freezing rain for six straight hours. Furthermore, the makeup artists ____________________________________ fake zombie blood continuously since dawn.
will have been standing / will have been reapplying
We use the Future Perfect Continuous (will have been + verb-ing) to emphasize the duration of an ongoing action leading up to a specific point in the future.
Future Continuous ("will be standing") only tells us an action will be in progress at a future time, but it cannot be used with duration markers like "for six straight hours."