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40. It would be very safe if you_________ the door_________ to the garden.

A.fasten;led                           B.will fasten;leads

C.fastened;leading                      D.fastened;to lead

C


解析:

此处为虚拟语气,条件句中用一般过去式,主句中用would+v.(原形)表示对现在的虚拟;第二空用分词作后置定语。?

答案:C?

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