39.In a school library
Librarian : Good afternoon.____A___
Tom : Yes, please. I'm looking for an Aesop's Fable.
Librarian : Alright.Go straight on.There are some on the bookshelves at the right corner.
Tom : Thank you for your kindness.
Librarian : ____B___
A. 1) what do you want? 2) what'er you doing 3)can i help you? 4) May I Come in?
B. 1) Don't worry. 2) see you later. 3) It's my job. 4) It's my pleasure.