Nobody noticed the thief slip into the house because the lights

Nobody noticed the thief slip into the house because the lights happened to__________.
A、put up
B、give in
C、be turned on
D、go out
【正确答案】：D
【题目解析】：本题的关键是理解题干的意思。句子的含义是：“没有人注意到小偷进屋，因为那时灯熄了。”符合题意的只有D项。