根据对话内容，从方框中选出适当的选项补全对话。

A. Oh, sorry. B. No hurry. C. Here you are. D. Can I help you? E. My pleasure.

(Li Lei arrives at the school library.)

Miss Wang:

Li Lei: Yes, I'd like to borrow a book on electric(电的) head.

Miss Wang: Electric head? I've never heard of it. Maybe ...

Li Lei:  It should be "a book on computer."

Miss Wang: I see. Yes, there is still one on the shelf.

Li Lei: Thanks a lot.

Miss Wang:

Li Lei: I'll try to finish it as soon as possible.

Miss Wang: You may keep it for two weeks.