nest

我在老橡树上发现了一个鸟巢。

I found a bird's ___nest in the old oak tree.

知更鸟经常在那片茂密的灌木丛中筑巢。

Robins often ___nest in that dense shrubbery.

许多鸟儿选择在高大的树上筑巢以确保安全。

Many birds choose to ___nest in tall trees for safety.