孩子们开心地享用着妈妈做的蛋糕。

The children happily ___tucked into the cake their mom made.

她小心翼翼地把衬衫下摆塞进裤子里。

She carefully ___tucked the shirt hem into her pants.

她把钥匙塞进了抽屉的后面。

She ___tucked the key into the back of the drawer.