小猫悄悄溜进厨房偷吃鱼。

The kitten ___sneaks into the kitchen to steal some fish.

他趁没人注意时偷偷把零食塞进了口袋。

He ___sneaks some snacks into his pocket when no one is looking.

那个学生是个爱打小报告的家伙，总是偷偷告诉老师其他同学的事情。

That student is a ___sneak who always tells the teacher about other classmates secretly.