lurk|lurked|lurking

黑暗的森林中总是潜伏着未知的危险。

Unknown dangers always ___lurk in the dark forest.

有人潜伏在树后，偷偷观察着我们的营地。

Someone ___lurked behind the trees, secretly watching our campsite.

我总觉得有人在树丛后面鬼鬼祟祟地潜伏着。

I felt like someone was ___lurking behind the bushes.