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】：句意：没有人注意到小偷溜进了房子，因为灯碰巧灭了。go out​ 熄灭；因此D符合题意。