Remember to the lights when you leave your classroom.A. turn onB. turn offC. turn upD. tur

问题补充：

Remember to the lights when you leave your classroom.

A. turn on

B. turn off

C. turn up

D. turn down

答案：

A. turn on

(答案→)B. turn off

C. turn up

D. turn down

解析：句意：当你离开教室的时候，记着去关灯。分析选项：turn on打开； turn off关掉；turn up调大；turn down调小。联系从句离开教室要关灯，故选 B