—I reminded you not to forget to turn off the lights when you left the classroom.—.A. So d

问题补充：

—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

答案：

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。