森林深处是最黑暗的地方，几乎没有阳光。

The deepest part of the forest is the ___darkest, with almost no sunlight.

这是他职业生涯中最黑暗的时光。

It was the ___darkest time in his career.

这部电影揭示了他内心最阴暗的想法。

The movie reveals his ___darkest thoughts.