Chinese test: How do you say “new book” in Chinese? (Elementary)

Today is Saturday. Li Hua is visiting Tom at his new house. Upon arrival, Li Hua is very surprised with Tom’s spacious and bright house, but finds something rather interesting. Look at the following conversation.

             Nà shì shénme?
Li Hua：那  是   什么?

            Wǒ de xīn __shū.
   Tom：我  的 新 ___ 书。

Question:

What should be filled in the blank?  _________

A．的 (de)

B． –

See answer