—I reminded you not to forget to turn off the lights when you left the classroom.
— .
A. So did I
B. So you did
C. So do you
D. I do so
网友回答
A. So did I
(答案→)B. So you did
C. So do you
D. I do so
解析：
句意为：——我提醒过你离开教室时不要忘记关灯。——你提醒了我。此处表示你的确提醒了我。故用“so＋主语＋助动词”的形式。