Change into Passive Voice.
Smoke filled the room.
AThe room were filled with smoke.
BThe room is filled with smoke.
CThe room has filled with smoke.
DThe room was filled with smoke.
Change into Passive Voice.
Smoke filled the room.
AThe room were filled with smoke.
BThe room is filled with smoke.
CThe room has filled with smoke.
DThe room was filled with smoke.