他偷偷地把手机藏进了书包里，不让老师发现。

He ___sneakily hid his phone in the bag to avoid the teacher's notice.

他偷偷摸摸地把零花钱藏进了玩具盒里，这样妈妈就不会发现了。

He ___sneakily hid his allowance in the toy box so his mom wouldn't find it.