Help!!!

Spanish subjunctive.
Details in picture attached

question:

No volveremos a casa hasta limpiar el patio de recreo. (Uds.)
[base sentence^]


No volveremos a casa hasta que (BLANK1) (BLANK2) el patio recreo.

I would also appreciate an explanation but an answer alone is fine.

Help Spanish subjunctive Details in picture attached question No volveremos a casa hasta limpiar el patio de recreo Uds base sentence No volveremos a casa hasta class=