David,turnofftheTV                 nooneiswatchingit.--...

问题详情：

David, turn off the TV                  no one is watching it.

--But it                  off already! The music is from the radio.

A so that; has been turned        B  when; has turned  

C  if; has been turned           D   because; has turned

【回答】

C

知识点：现在完成时及其被动式

题型：选择题