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职称英语
All the lights ______ before we left the office. [originaltext]时态和语态[/originalte
All the lights ______ before we left the office. [originaltext]时态和语态[/originalte
游客
2023-10-07
59
管理
问题
All the lights ______ before we left the office.
时态和语态
选项
A、has been turned off
B、have turned off
C、had been turned off
D、had turned off
答案
C
解析
此句中主句的动作在从句的动作之前,而从句的动作发生在过去,所以主句应该用过去完成时,因为all the lights和turn off之间是被动关系,所以应该用被动形式,故选C。
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