—Remember to turn off the lights when you leave the room.— .A. OK. I willB. No I won’tC.

问题补充：

—Remember to turn off the lights when you leave the room.

— .

A. OK. I will

B. No, I won’t

C. It doesn’t matter

D. I know that

答案：

(答案→)A. OK. I will

B. No, I won’t

C. It doesn’t matter

D. I know that

解析：祈使句的回答。祈使句的动作通常是表示将来发生的动作，所以回答祈使句时，一般用will或won’t。根据句意：当你离开房间时，记得关灯。可知A为正确答案。