He went into his room the light and began to work.A. has turned onB. turned offC. turned o

问题补充：

He went into his room,the light and began to work.

A. has turned on

B. turned off

C. turned on

D. has turned off

答案：

A. has turned on

B. turned off

(答案→)C. turned on

D. has turned off

解析：时态、动词短语的考察 进房间，开灯、开始工作一些列的顺成动作，均用一般过去时，