阅读短文，选择正确答案。

Hello! Welcome to the school library！I'm the librarian. We've got many kinds of books for you. Look! These big books are dictionaries. They are on Shelf A. They are heavy. Be careful when you take them. These books are about sports. We put them on Shelf B. The science books are on Shelf C. The books on Shelf D are about art. Where are the picture books？They are on Shelf E. Do you want to borrow a book？Stand in line and show me your library card.