Once in bed I read for twenty minutes and then the light.A. turned outB. turned overC. t

问题补充：

Once in bed,I read for twenty minutes and then the light.

A. turned out

B. turned over

C. turned on

D. turned up

答案：

(答案→)A. turned out

B. turned over

C. turned on

D. turned up

解析：turn out“关掉(灯或热源),熄灭”；turn over“翻身，翻转”；turn on“开灯”；turn up“露面”。