Упр.4 Обо мне в Рабочей тетради ГДЗ English Кузовлев 5 класс

Приведем выдержку из задания из учебника Кузовлев, Лапа, Перегудова 5 класс, Просвещение: 4. Rules at my school.
At my school we have to follow these rules:
_
I think the rule _ is the most useful. And the rule _ is not necessary. *Цитирирование части задания со ссылкой на учебник производится исключительно в учебных целях для лучшего понимания разбора решения задания.

At my school we have to follow these rules:

• We have to wear a school uniform.
• We have to be on time for lessons.
• We have to do our homework.
• We have to be polite to teachers and classmates.

I think the rule to be on time for lessons is the most useful. And the rule to wear a school uniform is not necessary.