1. There was not anybody in school because it was Sunday. There was nobody in school because it was Sunday. Write it in a different way.

Перевод задания: Напиши это по-другому.

There was nobody at school because it was Sunday. (В школе никого не было, потому что было воскресенье.)

Слова not anybody заменены на nobody. Перед названием места обычно употребляется at school.