I would not leave the room until I___all the windows.A. closed B.have closed C.would have closedD.had closed 为什么选D?

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I would not leave the room until I___all the windows.A. closed B.have closed C.would have closedD.had closed  为什么选D?

I would not leave the room until I___all the windows.A. closed B.have closed C.would have closedD.had closed 为什么选D?
I would not leave the room until I___all the windows.A. closed B.have closed C.would have closed
D.had closed 为什么选D?

I would not leave the room until I___all the windows.A. closed B.have closed C.would have closedD.had closed 为什么选D?
D.had closed 过去完成时 close 发生在 leave 之前 !
leave是过去动作(would not leave ) 所以 close 发生在过去的过去 即 过去完成时

请给满意 谢谢!

D.had closed 过去完成时 close 发生在 leave 之前 !
leave是过去动作(would not leave ) 所以 close 发生在过去的过去 即 过去完成时

请给满意 谢谢!