Before doing whitewashing on the _________ whitewashing on ___________ must be done.

Before doing whitewashing on the _________ whitewashing on __________

1.	Before doing whitewashing on the _________ whitewashing on ___________ must be done.
A.	Walls, doors
B.	Ceilings, walls
C.	Walls, ceilings
D.	Walls, windows
Answer» D. Walls, windows