M: I've been waiting for 3 weeks for someone to return Harry Potter to the library. I'm getting so impatient. ,F: Why don't you just buy your own copy online?
(A) M: You are right. I will buy a book online. (B) M: All right. I will return a book to the library, if someone return Harry Potter to me. (C) M: I am afraid I did not quite catch what you were saying. Please repeat it. (D) M: I don't think so. I still want to borrow a book. But I don't have patience to wait for that.
D