狐狸在树下挖了一个很深的洞作为住所。

The fox dug a deep ___burrow under the tree for its home.

小老鼠在地上挖了个洞作为它的家。

The little mouse ___burrowed a hole in the ground for its home.

小狗在毯子下面钻来钻去，找到了它最喜欢的玩具。

The puppy ___burrowed under the blanket to find its favorite toy.