他鬼鬼祟祟地从后门溜进了屋子，生怕被人发现。

He slipped into the house ___sneaky-like through the back door, trying not to be seen.

他蹑手蹑脚地溜进厨房，偷偷摸摸地把饼干罐藏了起来。

He tiptoed into the kitchen ___sneaky-like and hid the cookie jar.