【正确答案】
【答案解析】April 21, 2012
Dear Lily,
I"m sorry for not returning the book you lent to me last week. I"m still reading it now. I found it very helpful for writing my dissertation which is due tomorrow. I will go to your dormitory and return it to you tonight. Please accept my apology for not returning your book on time.
Yours sincerely,
Jane