We could see nothing because the lights suddenly .
A. went on
B. went over
C. went down
D. went out
网友回答
A. went on
B. went over
C. went down
(答案→)D. went out
解析：词义辨析。went on持续，继续前进；went over检查；远行；went down下跌；平静；went out离开，熄灭，发生。句意：我们什么也看不见，因为灯突然熄灭了。选D。