问题
选择题
Look, the lights in the room don’t . Someone must forget .
A．put out; going them out
B．be out; put them out
C．go out; to put them out
D．go out; putting them out
答案
答案：C
考查短语。go out不及物，put out及物，都有“熄灭”；forget to do忘记去做。句意：看！房间的等没有熄灭，一定有人忘记关了。