Вставим существительное, обозначающее предмет, который нужно чистить по утрам, чтобы выглядеть опрятно.
Jeff remembered that Granny had always been very strict about the morning routine. She never allowed her grandchildren to look untidy or avoid brushing their TEETH. "Ok, just a second," laughed Jeff picking up another doughnut and retreating
Ответ: TEETH