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