—The light in the office is still on.
—Oh,I forgot__________.
A.turning it off
B.turn it off
C.to turn it off
D.having turned it off
—The light in the office is still on.
—Oh,I forgot__________.
A.turning it off
B.turn it off
C.to turn it off
D.having turned it off
C
句意为“灯还开着。”“哦，我忘记关了。”忘记做某事为forget to do sth.。