清晨，几只小鸟在窗外的树上欢快地啾啾叫着。

In the morning, a few little birds ___chirruped happily in the tree outside the window.

小女孩高兴地叽叽喳喳谈论她新买的洋娃娃。

The little girl ___chirruped happily about her new doll.