浓雾让我很难看清前方的路。

The ___dense fog made it hard to see the road ahead.

我们徒步穿过了一片茂密的森林，里面长满了高大的树木。

We hiked through a ___dense forest full of tall trees.

一个声音从茂密的森林中传来，警告我们不要害怕。

A voice came from the ___dense forest, warning us not to be afraid.