Nobodynoticedthethiefslipintothehousebecausethelig

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

正确答案：D
答案为D因为灯碰巧熄灭没有人注意到小偷溜进房间goout“熄灭出去”；putup“举起”；givein“让步”；turnon“开(灯)”