Контрольные задания

Вопрос:

Фото задания: 1 A: That will be £90, madam. B: That's fine, I'll pay ......... credit card.

Фото задания

1 A: That will be £90, madam. B: That's fine, I'll pay ......... credit card.

1 A: That will be £90, madam.
B: That's fine, I'll pay by credit card.