保安发现有人鬼鬼祟祟地在停车场徘徊。

The guard spotted someone ___prowling around the parking lot suspiciously.

我听到有只猫在花园里悄悄走动。

I heard a cat ___prowling quietly in the garden.

我们看见一个可疑的男人在商店附近鬼鬼祟祟地徘徊。

We saw a suspicious man ___prowling around the store.