All of us didn't notice Tom e into the classroom because the light happened to at that time.
A. give in
B. put up
C. go out
D. switch off
网友回答
A. give in
B. put up
(答案→)C. go out
D. switch off
解析：短语辨析。A屈服；B张贴，搭建；留宿；C熄灭；外出；D切断；句意：我们中的所有人都没有注意到Tom进入了教室，因为那时碰巧灯都熄灭了。故C正确。