I have to apologize, she answered with a letter shortly. In fact, I read her letter from the date received, but I did not have time to answer her letters returned because I was learning so much.
I have to apologize to her by replying shortly. In fact, I read her letters since received. But I have no time to answer her letters back. It was here I learned a lot. Even this letter I also need to find the time to answer her.
I must apologize to you with a reply to slow. In fact, I read your letter since the day has been. But I have no time to answer your letter. Because here I learned a lot.