8. His father doesn’t pay / isn’t paying / didn’t pay 35 pounds for his bike two days ago.

Перевод задания: Выберите правильный вариант.

His father didn’t pay 35 pounds for his bike two days ago. — Его отец не заплатил 35 фунтов за свой велосипед два дня назад.

Указатель времени two days ago требует Past Simple.