---________

---It is a book.

[　　]

A．Is it a book?

B．What's this in English?

C．Is this your book?

—Is this your book, Alice?  —Yes, it is ____ book. Thank you.

 –Is this your book?   –Yes, ___________.

A. this is        B. it is         C. it isn’t      D. he is

- ________ book is this?

-- It's Mary's.

A. Whose             B. Where    C. How old           D. How many