.Nobody noticed the thief slip into the house because the lights happened to .
A. be put up
B. give in
C. be turned on
D. go out
网友回答
A. be put up
B. give in
C. be turned on
(答案→)D. go out
解析：短语辨析。 A. 被建成 B.屈服；让步 C. 被打开 D. 出去，熄灭。句意：没有人注意到贼溜进了房子，因为灯突然熄灭了。故选D。