Допоможіть!! Будь ласка Розкрийте дужки, вживаючи дієслова у Past Simple, Present Simple...

Question

Допоможіть!! Будь ласка
Розкрийте дужки, вживаючи дієслова у Past Simple, Present Simple або Past Continuous.

once, while I (to walk) in a park of London, I (to see an old man. He (to sit on a bench holding a book in his hands. I (to see) that the book (to be) of great interest. It (to be) a very old copy of early Byron's works. I to look) at the old man and (to understand) that he (to know) that I (to sit because of him and the book. I (to smile). "It is the last I (to have)", he (to say) and (to stretch) it out to me. I (to take) it with the words: "I love the old books." I (to open) the book and (to look) at the date: it (to be) a remarkable book. "I (to have) a hard life and this book (to be) a comfort to me. But I have to sell it," (to say) the old man.

Answer 1

once, while I (was walking) in a park of London, I saw an old man. He (was sitting on a bench holding a book in his hands. I ( saw) that the book (was) of great interest. It (was) a very old copy of early Byron's works. I  looked) at the old man and (understood) that he ( knew) that I (was sitting because of him and the book. I ( smiled). "It is the last I ( have)", he ( said) and (stretched) it out to me. I ( took) it with the words: "I love the old books." I ( opened) the book and ( looked) at the date: it (was) a remarkable book. "I ( have) a hard life and this book (is) a comfort to me. But I have to sell it," ( said) the old man.