根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。
--   1 
-- I want to borrow a book. Can you recommend(推荐) an interesting one?
--   2 
-- I like story and travel books.
-- Have you read “The Red and Black”?
-- Oh, yes I have. I want a book by Mark Twain.
--   3 
-- “The Adventure of Tom Sawyer”.
-- All right. I’ll get it for you.
--   4 
-- You may keep it for two weeks.
--   5  
-- You may come and renew them.
-- Thank you for your kind help.
-- You are welcome. Good-bye!
-- Good-bye!

A．What do you want?

B．Of course, I can. But tell me first what kind of books you like to read?

C．How long may I borrow the book?

D．Thanks a lot. How long may I keep the book?

E. What if I can’t finish on time?
F. Good morning! What can I do for you?
G. What’s the title of the book?