7. – Would you like to go to the park with us? – I'd love to, but I can't. I the library since 9 am. I'm preparing for my exams.

Ответ (EN):

I have been in the library since 9 am. I'm preparing for my exams.

Перевод (RU):

Я был в библиотеке с 9 утра. Я готовлюсь к экзаменам.