停电了，房子里一片黑暗。

There was a power cut and the house was in ___darkness.

太害怕了不敢哭，我站起来凝视着黑暗。

Too frightened to start crying, I just stood up and stared into the ___darkness.

夜幕降临，黑暗笼罩了森林。

As night fell, the ___darkness enveloped the forest.