小狗看到陌生人时，紧张地在角落里来回踱步。

The puppy paced ___skittishly in the corner when it saw a stranger.

小狗紧张不安地在草地上奔跑，四处追逐蝴蝶。

The puppy ran ___skittishly across the grass, chasing butterflies in every direction.