屋顶下有鸟儿筑巢。

There are birds ___nesting under the roof.

如果你周日上午沿着小路散步，可以看到知更鸟在古老的忍冬灌木中筑巢。

If you stroll along the path on a Sunday morning, you can see robins ___nesting in the old honeysuckle bush.

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.